GENX-1B - CLEANING,INSPECTION,AND REPAIR MANUAL

	GENX-1B CLEANING,INSPECTION,AND REPAIR MANUAL	Dated: 01/31/2025
	CIR 72-00-53 , INSPECTION 001
	HIGH PRESSURE TURBINE ROTOR ASSEMBLY - INSPECTION - CONFIGURATION 01

* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01

TASK 72-00-53-200-801

1 .

General.

This procedure gives instructions to do an inspection of the high pressure turbine (HPT) rotor assembly (15000). Refer to Figure 801.

Any sub-assembly or part removed for access or limited workscope must be inspected in accordance with criteria in this section. If there is no criteria, the sub-assembly or part must receive a general visual inspection (GVI) for continued serviceability. Refer to TASK 72-00-00-200-805 (72-00-00, INSPECTION 001) . If required, the component can be hand-cleaned to do a visual inspection. Refer to TASK 70-21-01-110-001 (CLEANING METHOD 1 - SOLVENT DEGREASING) or TASK 70-21-03-160-001 (CLEANING METHOD 3 - STEAM CLEANING) . GVI can not be done to components identified in TASK 05-21-00-200-801 (05-21-00, LIFE LIMITS 001) that become piece part. These components must have their appropriate mandatory inspections done, unless stated differently in an applicable Service Bulletin.

If you use this procedure and find that an assembly or part is unserviceable, refer to the applicable section of the engine manual for more disassembly and inspection procedures for the assembly or part.

If you will completely disassemble the HPT rotor assembly, this inspection is not necessary. Refer to the applicable section of the engine manual for the inspection procedure for each part.

The maintenance instructions in this Manual do not purport to cover all details or variations in equipment, nor do they provide for every possible contingency to be met in connection with installation, operation, maintenance, or GEAE certified repair facilities. The maintenance instructions are intended to be all-inclusive for a complete teardown and overhaul of the component or sub assembly. The individual procedures as written are one sequence based on General Electric experience. Alternate sequences to these maintenance instructions are at the discretion of the operator and/or overhaul shop provided the intent of the maintenance instructions is met. The operator and/or overhaul shop can select specific tasks to partially disassemble and assemble hardware or subassemblies based upon the on demand maintenance requirement of the individual engine work scope provided the final assembly configuration and requirements contained in the manual have been met.

There are two configurations for the HPT stage 2 blades as follows.

(1)

Configuration 1 blades (01-111 , 72-53-00) (SIN 150B0) (SB 72-0042 & pre SB 72-0080) have a thermal barrier coating (TBC) applied to the blade airfoil.

(2)

Configuration 2 blades (01-110 , 72-53-00) and (01-112 , 72-53-00) (SIN 150B0) (pre SB 72-0042 & SB 72-0080) do not have a TBC applied to the blade airfoil.

If an axisymmetric rotating part with a visible crack through the axial or radial thickness of the part feature is found during the inspection procedure, then the mating Life Limited Part(s) (LLP) can be affected. The mating LLP must be considered not serviceable and not repairable.

NOTE:

Typical axisymmetric parts are disks, spools, blisks, seals, shafts, retainers, and other rotating structures.

NOTE:

Contact GE Aerospace with part details of the cracked part and mating LLP with the Inquiries Widget on the https://my.geaerospace.com/ portal.

2 .

Tools, Equipment, and Materials.

NOTE:

You can use equivalent alternatives for tools, equipment, and consumable materials.

Tools and Equipment.

(1)

Special Tools. None.

(2)

Standard Tools and Equipment. None.

(3)

Locally Manufactured Tools. None.

Consumable Materials. None.

Code No.

Description

C10-071

Safety Wire

Referenced Procedures.

ATA No.

Description

70-42-00

Blending and Removal of High Metal Procedures

Expendable Parts. None.

3 .

Visual Inspection.

NOTE:

Scratches on the HPT rotor stages 1 and 2 blades that you cannot feel with a 0.005 inch (0.13 mm) radius pointed scribes are permitted on all surfaces if the environmental bond coating (Stage 1 blades) or platinum aluminide coating (Stage 2 blades) is not damaged.

NOTE:

Use a white light and a 10-30X magnifying glass where applicable to do the inspection of the disk surfaces.

NOTE:

A pit is a shallow depression that resembles a small crater with rounded edges and with no raised metal. Pitting is caused by localized or selective etching or corrosion that results in holes or pockets.

NOTE:

If damage to the HPT rotor stage 1 disk is more than the repairable limits, send the disk to GE Aircraft Engines for evaluation.

Subtask 72-00-53-220-001

Do an inspection of all visible areas of the HPT rotor forward seal (forward seal) (150A3) (this does not include ID and OD seal serrations, inducer pad, area A, inducer air holes, web, blade retainer, and transition seal neck) as follows. Refer to Figure 802.

(1)

Cracks:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the forward seal.

* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01

Figure 801 HPT Rotor Assembly - Inspection

* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01

Figure 802 Forward Seal - Inspection

Subtask 72-00-53-220-002

(2)

Scratches:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the forward seal.

Subtask 72-00-53-220-003

(3)

Nicks and dents:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the forward seal.

Subtask 72-00-53-220-005

Do an inspection of the seal serrations of the forward seal (150A3) as follows. Refer to Figure 802.

(1)

Nicks and dents:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the forward seal.

Subtask 72-00-53-220-199

(2)

Crack or cracked out areas:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the forward seal.

Subtask 72-00-53-220-006

(3)

Bending:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the forward seal.

Subtask 72-00-53-220-007

(4)

Missing spray coat (aluminum oxide):

(a)

If the mating static forward seal honeycomb is re-used (not replaced):

Maximum serviceable limit:

Any amount, if the parent metal is not exposed.

Repair method:

Replace the forward seal.

Subtask 72-00-53-220-428

(b)

If the mating static forward seal honeycomb is replaced:

Maximum serviceable limit:

Areas 0.300 inch (7.62 mm) in circumferential length, are permitted on each tooth, if they are a minimum of 1.00 inch (25.4 mm) apart. Total missing spray coat must not be more than 1.50 inches (38.1 mm).

Repair method:

Replace the forward seal.

Subtask 72-00-53-220-008

Do an inspection of area A of the forward seal (150A3) as follows. Refer to Figure 802.

(1)

Nicks, dents, scratches, or other damage:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the forward seal.

Subtask 72-00-53-220-009

Do an inspection of the inducer air holes (62 holes) of the forward seal (150A3) as follows. Refer to Figure 802.

(1)

Nicks, dents, or scratches:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the forward seal.

Subtask 72-00-53-220-010

(2)

Damage at the edge radius:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the forward seal.

Subtask 72-00-53-220-011

Do an inspection of the web, blade retainer, transition seal neck, and inducer pad of the forward seal (150A3) as follows. Refer to Figure 802.

(1)

Nicks, scratches, and fretting less than 0.250 inch (6.35 mm) from any fillet radius:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the forward seal.

Subtask 72-00-53-220-012

(2)

Nicks and scratches in other areas:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the forward seal.

Subtask 72-00-53-220-013

(3)

Dents:

Maximum serviceable limit:

0.003 inch (0.08 mm) in depth, after the removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).

Repair method:

Replace the forward seal.

Subtask 72-00-53-220-160

Do an inspection of the internal retaining ring (150A4) as follows. Refer to Figure 801.

(1)

Cracks:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the internal retaining ring.

Subtask 72-00-53-220-014

Do an inspection of the web and hub faces of the HPT rotor stage 1 disk (stage 1 disk) (150A1) as follows. Refer to Figure 803.

(1)

Nicks, scratches, and fretting less than 0.250 inch (6.35 mm) from any fillet radius:

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

0.010 inch (0.25 mm) in depth after blending.

Repair method:

Blend to remove damage. Polish to the same finish as the adjacent area, use 0.50 inch (12.7 mm) minimum blend radius. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).

* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01

Figure 803 Stage 1 Disk Rim, Web, and Bore - Inspection

Subtask 72-00-53-220-015

(2)

Nicks and scratches in other areas:

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

Any amount, 0.010 inch (0.25 mm) in depth after blending.

Repair method:

Blend to remove damage, use a 0.50 inch (12.7 mm) minimum blend radius. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).

Subtask 72-00-53-220-016

(3)

Dents:

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

0.010 inch (0.25 mm) in depth, after the removal of high metal, use a 0.50 inch (12.7 mm) minimum blend radius.

Repair method:

Blend to remove damage. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).

Subtask 72-00-53-220-161

Do an inspection of the bore of the stage 1 disk (150A1) as follows. Refer to Figure 803.

(1)

Nicks and scratches:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the stage 1 disk.

Subtask 72-00-53-220-162

(2)

Dents:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the stage 1 disk.

Subtask 72-00-53-220-163

(3)

Damage in the edge radius:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the stage 1 disk.

Subtask 72-00-53-220-017

Do an inspection of the air duct rabbet/mate face of the stage 1 disk (01-280 , 72-53-00) (SIN 150A1). Refer to Figure 804 and as follows:

(1)

Fretting (pickup and high metal):

Maximum serviceable limit:

0.003 inch (0.08 mm) in depth and 180 degrees of the circumference, if there is no high metal.

Maximum repairable limit:

0.003 inch (0.08 mm) in depth and 180 degrees of the circumference, after the removal of high metal.

Repair method:

Remove high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .

NOTE:

Etch, FPI and shot peen are needed after high metal removal. Rotary flap peening can be used as an alternative for the TASK 70-47-01-380-016 (SHOTPEENING). Refer to TASK 70-47-04-380-019 (ROTARY FLAP PEENING).

* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01

Figure 804 (Sheet 1 ) Stage 1 Disk Aft Shaft - Inspection

* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01

Figure 804 (Sheet 2 ) Stage 1 Disk Aft Shaft - Inspection

Subtask 72-00-53-220-018

(2)

Nicks, dents, and scratches:

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

0.003 inch (0.08 mm) in depth, if the blend area is not more than 20 percent of the area, 0.250 inch (6.35 mm) from adjacent radii.

Repair method:

Blend to remove damage. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).

Subtask 72-00-53-220-420

Do an inspection of the aft shaft tabs on the aft shaft of the stage 1 disk (01-280 , 72-53-00) (SIN 150A1). Refer to Figure 804 and as follows:

(1)

Fretting and wear:

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

0.010 inch (0.25 mm) in depth.

Repair method:

Blend with a minimum blend radius of 0.250 inch (6.35 mm). Refer to TASK 72-53-40-300-801 (72-53-40, REPAIR 001) . Rotary flap peening can be used as an alternative. Refer to TASK 70-47-04-380-019 (ROTARY FLAP PEENING) .

Subtask 72-00-53-220-421

(2)

Nicks, dents, and scratches:

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

0.010 inch (0.25 mm) in depth.

Repair method:

Subtask 72-00-53-220-166

Do an inspection of the internal/external surfaces, area FB, on the aft shaft of the stage 1 disk (150A1) as follows. Refer to Figure 804.

(1)

Nicks and scratches:

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

0.008 inch (0.20 mm) in depth.

Repair method:

Hand blend to remove damage. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).

Subtask 72-00-53-220-167

(2)

Dents:

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

0.010 inch (0.25 mm) in depth, after the removal of high metal.

Repair method:

Blend to remove damage. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).

Subtask 72-00-53-220-400

Do an inspection of the accessible internal/external surfaces, areas FC and FD, on the aft shaft of the stage 1 disk (01-280 , 72-53-00) (SIN 150A1) as follows. Refer to Figure 804.

(1)

Nicks and dents in area FC, external surfaces:

Maximum serviceable limit:

0.003 inch (0.07 mm) after the removal of high metal.

Maximum repairable limit:

0.005 inch (0.12 mm) after the removal of high metal.

Repair method:

Blend to remove damage. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) . Do a shot peen of blended areas with rotary flap peening. Refer to TASK 70-47-04-380-019 (ROTARY FLAP PEENING) . Peen to an intensity of 6-12 N. Mask aft shaft holes.

Subtask 72-00-53-220-401

(2)

Scratches in area FC, external surfaces:

Maximum serviceable limit:

0.002 inch (0.05 mm) after the removal of high metal.

Maximum repairable limit:

0.005 inch (0.12 mm) after the removal of high metal.

Repair method:

Subtask 72-00-53-220-402

(3)

Nicks and dents in area FC, internal surfaces:

Maximum serviceable limit:

0.003 inch (0.07 mm) after the removal of high metal.

Maximum repairable limit:

0.005 inch (0.12 mm) after the removal of high metal.

Repair method:

Subtask 72-00-53-220-403

(4)

Scratches in area FC, internal surfaces:

Maximum serviceable limit:

0.002 inch (0.05 mm) after the removal of high metal.

Maximum repairable limit:

0.005 inch (0.12 mm) after the removal of high metal.

Repair method:

Subtask 72-00-53-220-404

(5)

Nicks and dents in area FD, external surfaces:

Maximum serviceable limit:

0.003 inch (0.07 mm) after the removal of high metal.

Maximum repairable limit:

0.005 inch (0.12 mm) after the removal of high metal.

Repair method:

Subtask 72-00-53-220-405

(6)

Scratches in area FD, external surfaces:

Maximum serviceable limit:

0.002 inch (0.05 mm) after the removal of high metal.

Maximum repairable limit:

0.005 inch (0.12 mm) after the removal of high metal.

Repair method:

Subtask 72-00-53-220-406

(7)

Nicks and dents in area FD, internal surfaces:

Maximum serviceable limit:

0.003 inch (0.07 mm) after the removal of high metal.

Maximum repairable limit:

0.005 inch (0.12 mm) after the removal of high metal.

Repair method:

Subtask 72-00-53-220-407

(8)

Scratches in area FD, internal surfaces:

Maximum serviceable limit:

0.002 inch (0.05 mm) after the removal of high metal.

Maximum repairable limit:

0.005 inch (0.12 mm) after the removal of high metal.

Repair method:

Subtask 72-00-53-220-168

Do an inspection of the heat shield pilots on the aft shaft of the stage 1 disk (150A1) as follows. Refer to Figure 804.

(1)

Pickup and high metal:

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

Any amount, if the damage area is less than 20 percent of the total area after the removal of high metal.

Repair method:

Blend to remove high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).

Subtask 72-00-53-220-169

(2)

Nicks, dents, and scratches:

Maximum serviceable limit:

Nicks and dents, 0.020 inch (0.51 mm) in depth, after the removal of high metal. Scratches 0.010 inch (0.25 mm) in depth after the removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).

Repair method:

Replace the stage 1 disk.

Subtask 72-00-53-220-170

Do an inspection of the No. 4 bearing journal surface on the aft shaft of the stage 1 disk (150A1) as follows. Refer to Figure 804.

(1)

Pickup and high metal:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the stage 1 disk.

Subtask 72-00-53-220-171

(2)

Nicks, dents, scores, and scratches:

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

0.010 inch (0.25 mm) in depth, after the removal of high metal, if not more than three percent of the journal OD is damaged in any 90 degree section. Dents must not be more than 0.10 inch (2.5 mm) in diameter.

Repair method:

Blend to remove damage. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).

Subtask 72-00-53-220-172

(3)

Fretting:

Maximum serviceable limit:

Any amount that you cannot find with a 0.060 inch (1.52 mm) radius scribe.

Repair method:

Replace the stage 1 disk.

Subtask 72-00-53-220-173

Do an inspection of the air duct threads, coupling nut threads, and No. 4 bearing round plain nut threads on the aft shaft of the stage 1 disk (150A1) as follows. Refer to Figure 804.

(1)

Nicks, dents, pickup, or high metal:

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

•

Removal of the first half of the entrance thread is permitted if the remaining threads are not damaged

•

If the entrance thread is not damaged, the total length of the damage in the other threads must not be more than 50 percent of one full thread.

Repair method:

Blend to remove high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).

NOTE:

Shot peening is not needed after fluorescent penetrant inspection (FPI). Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).

Subtask 72-00-53-220-174

(2)

Pitting:

Maximum serviceable limit:

Any amount, if you cannot measure the depth.

Repair method:

Replace the stage 1 disk.

Subtask 72-00-53-220-175

Do an inspection of the No. 4 bearing radial oil scoop diameter on the aft shaft of the stage 1 disk (150A1) as follows. Refer to Figure 804.

(1)

Nicks, dents, scratches, and galling:

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

0.010 inch (0.25 mm) in depth, after the removal of high metal, if not more than 5 percent of the diameter is damaged in any 90 degree section.

Repair method:

Blend to remove damage. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).

Subtask 72-00-53-220-022

Do an inspection of the boltholes on the forward shaft of the stage 1 disk (150A1) as follows. Refer to Figure 805.

(1)

Scratches, scoring, and fretting:

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

Up to 0.0004 inch (0.010 mm) in depth, if the hole diameter is not more than 0.464 inch (11.78 mm).

Repair method:

Clean the damaged boltholes. Refer to TASK 70-22-06-110-043 (SPECIAL CLEANING PROCEDURE NO. 6 - BOLTHOLE CLEANING FOR EDDY CURRENT INSPECTION) . Etch and FPI the repaired area. Shotpeen is not needed after FPI.

* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01

Figure 805 Stage 1 Disk Forward Shaft - Inspection

Subtask 72-00-53-220-023

(2)

Damage in the edge radius:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the stage 1 disk.

Subtask 72-00-53-220-424

Do an inspection of the aft face of forward flange of the stage 1 disk (01-280 , 72-53-00) (SIN 150A1). Refer to Figure 805 and as follows:

(1)

Scratches, scoring, and fretting:

Maximum serviceable limit:

• 0.001 inch (0.02 mm) in depth, after the removal of high metal. Refer to TASK 70-42-00-350-029 (GENERAL REMOVAL OF HIGH METAL (NO SHOT PEENING)) . Shotpeen is not needed after FPI

• 0.002 inch (0.05 mm) in depth, after the removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) . Etch, FPI and shotpeen are needed after the removal of high metal.

Repair method:

Replace the stage 1 disk.

Subtask 72-00-53-220-026

Do an inspection of the internal/external surfaces, area FA (critical), on the forward shaft of the stage 1 disk (150A1) as follows. Refer to Figure 805.

(1)

Nicks, dents, and scratches:

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

0.005 inch (0.13 mm) in depth and 0.50 inch (12.7 mm) apart.

Repair method:

Hand blend to remove damage, use a 0.50 inch (12.7 mm) minimum blend radius. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).

Subtask 72-00-53-220-031

Do an inspection of the forward flange rabbet on the forward shaft of the stage 1 disk (150A1) as follows. Refer to Figure 805.

(1)

Fretting/wear:

NOTE:

This inspection is only necessary when the HPT rotor assembly is removed from the combustor diffuser nozzle (CDN) assembly (0010A).

Maximum serviceable limit:

0.002 inch (0.05 mm), if the damaged area is less than 10 percent of the rabbet area.

Repair method:

Replace the stage 1 disk.

Subtask 72-00-53-220-038

Do an inspection of the leading edge of each HPT rotor stage 1 blade (stage 1 blade) (01-210 , 72-53-00) (SIN 150A0) or (01-211 , 72-53-00) (SIN 150A0) as follows. Refer to Figure 806.

(1)

Blocked nose holes (rows 4 thru 8) in areas K, L, and M:

Maximum serviceable limit:

One blocked cooling hole permitted in area M only.

Maximum repairable limit:

Any amount.

Repair method:

Remove the blockage.

* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01

Figure 806 (Sheet 1 ) Stage 1 Blades - Inspection

* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01

Figure 806 (Sheet 2 ) Stage 1 Blades - Inspection

* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01

Figure 806 (Sheet 3 ) Stage 1 Blades - Inspection

* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01

Figure 806 (Sheet 4 ) Stage 1 Blades - Inspection

* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01

Figure 806 (Sheet 5 ) Stage 1 Blades - Inspection

Subtask 72-00-53-220-039

(2)

Blocked concave gill holes (row 9) in areas K, L, and M:

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

Any amount.

Repair method:

Remove the blockage.

Subtask 72-00-53-220-040

(3)

Blocked convex gill holes (row 3) in areas K, L, and M:

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

Any amount.

Repair method:

Remove the blockage.

Subtask 72-00-53-220-041

(4)

Radial cracks in the nose holes (rows 4 thru 8) in areas K, L, and M:

Maximum serviceable limit:

Any amount, if cracks do not connect two holes and do not turn into the axial direction.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-042

(5)

Axial cracks in the nose holes (rows 4 thru 8) in areas K, L, and M:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-043

(6)

Radial cracks out of the concave and convex gill holes (rows 3 and 9) in areas K, L, and M:

Maximum serviceable limit:

Any amount, if the cracks do not connect two holes and do not turn into the axial direction.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-044

(7)

All other cracks:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-176

(8)

Nicks and dents in areas K and L:

Maximum serviceable limit:

Any amount, 0.100 inch (2.54 mm) maximum in diameter and 0.015 inch (0.38 mm) in depth, if there is a clear separation between defects and they are not related to tears, cracks, or missing material.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-177

(9)

Nicks and dents in area M (this does not include the root fillet radius):

Maximum serviceable limit:

One, 0.100 inch (2.54 mm) in diameter and 0.015 inch (0.38 mm) in depth, if the defect is not related to tears, cracks, or missing material.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-178

(10)

Nicks in the root fillet radius (root radius):

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-179

(11)

Pits and dents in the root fillet radius (root radius):

Maximum serviceable limit:

One, 0.100 inch (2.54 mm) maximum in diameter and 0.015 inch (0.38 mm) in depth, if there is a clear separation between defects and they are not related to tears, cracks, or missing material.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-180

(12)

Tears in areas K, L, and M:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-181

(13)

Missing environmental bond coating in areas K, L, and M:

Maximum serviceable limit:

•

Any amount, if in an area that is 0.030 inch (0.76 mm) or less from the cooling hole exit

•

Five areas not related to cooling hole exits, 0.020 inch (0.51 mm) maximum diameter with 0.100 inch (2.54 mm) spacing

•

Two areas not related to cooling hole exits, 0.050 inch (1.27 mm) in diameter with 0.250 inch (6.35 mm) spacing.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-045

Do an inspection of the concave side of the airfoil of each stage 1 blade (01-210 , 72-53-00) (SIN 150A0) or (01-211 , 72-53-00) (SIN 150A0) as follows. Refer to Figure 806.

(1)

Blocked cooling holes in rows 10, 11, 12, and 15 in area M:

Maximum repairable limit:

Not serviceable.

Maximum repairable limit:

Any amount.

Repair method:

Remove the blockage.

Subtask 72-00-53-220-046

(2)

Blocked cooling holes in rows 10, 11, 12, 15, and 16 in areas K and L:

Maximum serviceable limit:

One hole total for each row. Blocked concave cooling holes cannot be downstream of other blocked cooling holes.

Maximum repairable limit:

Any amount.

Repair method:

Remove the blockage.

Subtask 72-00-53-220-047

(3)

Cracks that start at the cooling holes in rows 10 thru 12 of area M:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-048

(4)

Cracks that start at the cooling holes in rows 10 thru 12 of areas K and L:

Maximum serviceable limit:

Three total, 0.050 inch (1.27 mm) in length, if the cracks are not open because of oxidation.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-049

(5)

Cracks that start at the cooling holes in row 15 of area L:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-050

(6)

Cracks that start at the cooling holes in rows 15 of area K:

Maximum serviceable limit:

One, 0.050 inch (1.27 mm) in length, if the crack is not open because of oxidation.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-052

(7)

Radial cracks that start at the tip bleed holes (row 16):

Maximum serviceable limit:

Any amount, 0.050 inch (1.27 mm) in length, if the cracks are not axial.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-182

(8)

All other cracks:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-183

(9)

Nicks and dents in areas K and L:

Maximum serviceable limit:

Any amount, 0.100 inch (2.54 mm) in diameter and 0.015 inch (0.38 mm) in depth, if there is a clear separation between the defects and they are not related to tears, cracks, or missing material.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-184

(10)

Nicks and dents in area M (this does not include the root fillet radius):

Maximum serviceable limit:

Three, 0.100 inch (2.54 mm) in diameter and 0.015 inch (0.38 mm) in depth, if there is a separation between the defects of 0.25 inch (6.4 mm) and they are not related to tears, cracks, or missing material.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-185

(11)

Nicks in the root fillet radius:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-186

(12)

Pits and dents in the root fillet radius:

Maximum serviceable limit:

One, 0.100 inch (2.54 mm) in diameter and 0.010 inch (0.25 mm) in depth, if the defect is not related to tears, cracks, or missing material.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-187

(13)

Distortion or evidence of burning or melting:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-188

(14)

Missing environmental bond coating in areas K, L, and M:

Maximum serviceable limit:

•

Any amount at the exit of the cooling holes, if it is a maximum of 0.030 inch (0.76 mm) from the cooling hole exit

•

Five areas total not related to cooling hole exits, 0.035 inch (0.89 mm) maximum in diameter, with 0.100 inch (2.54 mm) spacing

•

Two areas total, not related to cooling hole exits, 0.100 inch (2.54 mm) in diameter, with 0.250 inch (6.35 mm) spacing.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-053

Do an inspection of the convex side of the airfoil of each stage 1 blade (01-210 , 72-53-00) (SIN 150A0) or (01-211 , 72-53-00) (SIN 150A0) as follows. Refer to Figure 806.

(1)

Blocked cooling holes in rows 1 and 2 in area M:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-054

(2)

Blocked cooling holes in rows 1 and 2 in areas K and L:

Maximum serviceable limit:

One hole total for each row. Blocked convex cooling holes cannot be downstream of other blocked cooling holes.

Maximum repairable limit:

Any amount.

Repair method:

Remove the blockage.

Subtask 72-00-53-220-189

(3)

Cracks that start at the cooling holes in rows 1 and 2 of areas K and L:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the stage 1 blade

Subtask 72-00-53-220-190

(4)

Cracks that start at the cooling holes in rows 1 and 2 in area M:

Maximum serviceable limit:

Two, 0.050 inch (1.27 mm) in length, if the cracks are not open because of oxidation.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-055

(5)

All other cracks:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-056

(6)

Nicks and dents in areas K and L:

Maximum serviceable limit:

Any amount, 0.100 inch (2.54 mm) in diameter and 0.015 inch (0.38 mm) in depth, if there is a clear separation between the defects and they are not related to tears, cracks, or missing material.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-191

(7)

Nicks and dents in area M (this does not include the root fillet radius):

Maximum serviceable limit:

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-192

(8)

Nicks in the root fillet radius:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-193

(9)

Pits and dents in the root fillet radius:

Maximum serviceable limit:

One, 0.100 inch (2.54 mm) in diameter and 0.010 inch (0.25 mm) in depth, if the defect is not related to tears, cracks, or missing material.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-194

(10)

Distortion or evidence of burning or melting:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-195

(11)

Missing environmental bond coating in areas K, L, and M:

Maximum serviceable limit:

•

Any amount at the exit of the cooling holes if it is a maximum of 0.030 inch (0.76 mm) from the cooling hole exit

•

Five areas total not related to cooling hole exits, 0.035 inch (0.89 mm) maximum in diameter with 0.100 inch (2.54 mm) spacing

•

Two areas total, not related to cooling hole exits, 0.100 inch (2.54 mm) in diameter with 0.250 inch (6.35 mm) spacing.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-057

Do an inspection of the trailing edge (this includes the area N root fillet radius) of each stage 1 blade (01-210 , 72-53-00) (SIN 150A0) or (01-211 , 72-53-00) (SIN 150A0) as follows. Refer to Figure 806.

(1)

Cracks:

Maximum serviceable limit:

Any amount, in an area less than 0.100 inch (2.54 mm) from the trailing edge tip.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-058

(2)

Blocked or plugged air slots:

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

Any amount.

Repair method:

Remove the blockage.

Subtask 72-00-53-220-059

(3)

Oxidation (this does not include root fillet radius):

Maximum serviceable limit:

Any amount, 0.015 inch (0.38 mm) in depth, if you cannot see the inner cavities of the blade.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-060

(4)

Oxidation in the root fillet radius:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-061

(5)

Missing material:

Maximum serviceable limit:

Two areas, 0.100 inch (2.54 mm) in diameter, if you cannot see the inner cavities of the blade.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-062

(6)

Missing environmental bond coating:

Maximum serviceable limit:

Two areas, 0.100 inch (2.54 mm) in diameter.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-063

Do an inspection of the blade tip area of each stage 1 blade (01-210 , 72-53-00) (SIN 150A0) or (01-211 , 72-53-00) (SIN 150A0) as follows. Refer to Figure 806.

(1)

Radial cracks that start at the concave or convex blade tip:

Maximum serviceable limit:

•

Any amount, 0.050 inch (1.27 mm) in length

•

Two for each side, 0.125 inch (3.18 mm) in length, with a separation of 0.250 inch (6.35 mm).

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-064

(2)

Bent or curled squealer tip material:

Maximum serviceable limit:

Any amount above the tip cap, if any tears and cracks related to the defect are in the limits specified for tears and cracks.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-065

(3)

Missing squealer tip material:

Maximum serviceable limit:

Two areas, 0.300 inch (7.62 mm) in length, that extend radially to 0.020 inch (0.51 mm) or less from the tip cap, with a separation of 0.250 inch (6.35 mm), if the opposite side squealer tip is not damaged and you cannot see the inner cavities of the blade.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-066

(4)

Wear as a result of shroud rub:

Maximum serviceable limit:

Any amount, within 0.020 inch (0.51 mm) of the tip cap, if in the serviceable limits for the turbine clearance and the shroud maximum/minimum ID.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-067

(5)

Nicks and dents:

Maximum serviceable limit:

Any amount, 0.020 inch (0.51 mm) in depth.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-068

(6)

Missing environmental bond coating:

Maximum serviceable limit:

Any amount up to 0.200 inch (5.08 mm) in total (cumulative) length for each squealer tip side, if the area of missing coating is 0.020 inch (0.51 mm) above the tip cap.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-069

(7)

Squealer tip oxidation/erosion:

Maximum serviceable limit:

One area for each squealer tip side, 0.300 inch (7.62 mm) in length, if the oxidation/erosion is 0.020 inch (0.51 mm) above the tip cap.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-395

(8)

Blocked cooling holes in row 16:

Maximum serviceable limit:

One blocked cooling hole serviceable.

Maximum repairable limit:

Any amount.

Repair method:

Remove the blockage.

Subtask 72-00-53-220-070

Do an inspection of the tip cap of each stage 1 blade (01-210 , 72-53-00) (SIN 150A0) or (01-211 , 72-53-00) (SIN 150A0) as follows. Refer to Figure 806.

(1)

Blocked cooling holes in row 17:

Maximum serviceable limit:

One blocked hole serviceable.

Maximum repairable limit:

Any amount.

Repair method:

Remove the blockage.

Subtask 72-00-53-220-071

(2)

Bowing:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-072

(3)

Cracks:

Maximum serviceable limit:

•

Any amount, 0.020 inch (0.51 mm) in length, that starts from the tip cap cooling holes. Cracks that connect two cooling holes are permitted

•

Any amount, 0.030 inch (0.76 mm) in length, that starts from squealer tip radial cracks. Cracks are not permitted to extend fully across tip cap and connect concave and convex squealer tip walls.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-073

(4)

Oxidation/erosion of the tip cap braze alloy:

Maximum serviceable limit:

Any amount, if the oxidation/erosion is 0.020 inch (0.51 mm) above the tip cap.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-074

AA.

Do an inspection of the top surface and edges of the platform (this does not include root fillet radius) of each stage 1 blade (01-210 , 72-53-00) (SIN 150A0) or (01-211 , 72-53-00) (SIN 150A0) as follows. Refer to Figure 806.

(1)

Missing environmental bond coating:

Maximum serviceable limit:

Any amount.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-075

(2)

Nicks:

Maximum serviceable limit:

Any amount, 0.020 inch (0.51 mm) in depth, after the removal of the high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-076

(3)

Dents:

Maximum serviceable limit:

Any amount, 0.020 inch (0.51 mm) in depth.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-077

(4)

Cracks:

Maximum serviceable limit:

Any amount, 0.100 inch (2.54 mm) in length, if the cracks do not extend into the root fillet radius.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-079

(5)

Bowing of the concave platform edge:

Maximum serviceable limit:

Any amount, 0.030 inch (0.76 mm) radial deflection, at the concave platform edge.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-080

AB.

Do an inspection of the each stage 1 blade (01-210 , 72-53-00) (SIN 150A0) or (01-211 , 72-53-00) (SIN 150A0) as follows. Refer to Figure 806.

(1)

Bent or curled material on the trailing edge upper angel wing:

Maximum serviceable limit:

Any amount, 0.200 inch (5.08 mm) in the circumferential direction x 0.200 inch (5.08 mm) in the axial direction and 0.030 inch (0.76 mm) out of plane deflection, if the deflection is in the upward direction and the defect is not related to cracks or tears.

Maximum repairable limit:

Any amount, 0.350 inch (8.89 mm) in the circumferential direction x 0.200 inch (5.08 mm) in the axial direction, if the defect is not related to cracks or tears. You must not repair more than seven stage 1 blades for each HPT rotor assembly.

Repair method:

Blend to remove the bent or curled material. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).

Subtask 72-00-53-220-081

(2)

Bent or curled material on the trailing edge lower angel wing:

Maximum serviceable limit:

Any amount, 0.200 inch (5.08 mm) in the circumferential direction x 0.200 inch (5.08 mm) in the axial direction and 0.005 inch (0.13 mm) out of plane deflection, if the deflection is in the upward direction and the defect is not related to cracks or tears.

Maximum repairable limit:

Repair method:

Blend to remove the bent or curled material. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).

Subtask 72-00-53-220-082

(3)

Circumferential wear groove on the top or bottom surfaces:

Maximum serviceable limit:

Any amount, 0.010 inch (0.25 mm) in depth, if the groove is 0.050 inch (1.27 mm) from the vertical shank surfaces.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-083

(4)

Circumferential rubs or wear below the leading edge angel wing:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-084

(5)

Positive metal deposits on the upper and lower surfaces of the leading edge and both trailing edge angel wings as a result of rotor-to-stator rubs:

Maximum serviceable limit:

Any amount, 0.005 inch (0.13 mm) in height.

Maximum repairable limit:

Any amount.

Repair method:

Blend with a hand stone to remove high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).

Subtask 72-00-53-220-085

AC.

Do an inspection of all flowpath surfaces (concave and convex sides of the airfoil and the upper surface of the platform) for:

(1)

Metal splatter:

Maximum serviceable limit:

Any amount, if it does not prevent the inspection of other damage.

Maximum repairable limit:

Any amount.

Repair method:

Blend with a hand stone to remove high metal or metal splatter. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).

Subtask 72-00-53-220-086

AD.

Do an inspection of the thermal barrier coating (TBC) areas for:

(1)

Concave and convex surfaces that have missing TBC outside of area X:

Maximum serviceable limit:

•

Two areas not related to the cooling hole exits if 0.150 inch (3.81 mm) in diameter or equivalent area and 0.100 inch (2.54 mm) apart.

•

One area not related to the cooling hole exits if 0.300 inch (7.62 mm) in diameter or equivalent area and 0.200 inch (5.08 mm) away from nearest area of missing TBC (does not include TBC missing from cooling hole exit).

•

Any amount at the exit of the cooling holes if not more than 0.040 inch (1.02 mm) away from the cooling hole exit.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-202

(2)

Concave surfaces that have missing TBC in area X:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-087

(3)

Missing TBC at blade tip area

Maximum serviceable limit:

Any amount, if not more than 0.075 inch (1.91 mm) away from blade tip area.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-088

(4)

TBC missing in 0.050 inch (1.27 mm) of the edge of the platform area (includes the angel wings and any location around edge of platform):

Maximum serviceable limit:

Any amount, if not more than 0.100 inch (2.54 mm) away from the platform edge.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-089

(5)

TBC missing on the platform (not related to platform edge):

Maximum serviceable limit:

One area for each side (concave and convex) is permitted, if not more than 0.200 inch (5.08 mm) in diameter.

Repair method:

Replace the stage 1 blade.

Subtask 72-00-53-220-207

* * * SB 72-0089( Stage 1 Blades with a Second Layer of TBC )

(6)

Missing TBC in area Y (convex surface):

Maximum serviceable limit:

Any amount of the top layer of TBC if no base metal is exposed. If base metal is exposed, two areas, if they are no more than 0.100 inch (2.54 mm) in diameter or equivalent area, and 0.100 inch (2.54 mm) apart. If base metal is exposed, one area, if it is no more than 0.200 inch (5.08 mm) in diameter or equivalent area.

Repair method:

Replace the stage 1 blade.

NOTE:

Pre service bulletin 72-0089 does not use this step. Service bulletin 72-0089 adds a second layer of TBC for the stage 1 blades.

* * * END SB 72-0089

Subtask 72-00-53-220-093

AE.

Do an inspection of the cooling holes of each HPT rotor stage 2 blade (stage 2 blade) (01-110 , 72-53-00) or (01-111 , 72-53-00) or (01-112 , 72-53-00) (150B0) as follows. Refer to Figure 807.

(1)

Blocked cooing holes

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

Any amount.

Repair method:

Remove the blockage with safety wire.

* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01

Figure 807 (Sheet 1 ) Stage 2 Blades - Inspection

* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01

Figure 807 (Sheet 2 ) Stage 2 Blades - Inspection

Subtask 72-00-53-220-094

(2)

Blocked tip cap holes:

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

Any amount.

Repair method:

Remove the blockage with safety wire.

Subtask 72-00-53-220-095

AF.

Do an inspection of all airfoil surfaces of each stage 2 blade (01-110 , 72-53-00) or (01-111 , 72-53-00) or (01-112 , 72-53-00) (150B0) as follows. Refer to Figure 807.

(1)

Metal splatter:

Maximum serviceable limit:

Any amount, if it does not prevent inspection of other areas.

Repair method:

Replace the stage 2 blade.

Subtask 72-00-53-220-096

(2)

Burning:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the stage 2 blade.

Subtask 72-00-53-220-097

(3)

Distortion or melting:

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

Replace the stage 2 blade.

Subtask 72-00-53-220-098

(4)

Corrosion (raised or discolored coating with smooth surface and/or blisters):

Maximum serviceable limit:

Any amount, if the blisters are not open or if the coating is not flaked off.

Repair method:

Replace the stage 2 blade.

Subtask 72-00-53-220-099

(5)

Chipped or missing platinum aluminide coating (no parent metal) on the surfaces adjacent to the cooling holes:

Maximum serviceable limit:

0.015 inch (0.38 mm) diameter adjacent to all cooling holes.

Repair method:

Replace the stage 2 blade.

Subtask 72-00-53-220-203

(6)

Missing TBC on configuration 1 stage 2 blades (01-111 , 72-53-00) (SIN 150B0) only:

Maximum serviceable limit:

Any amount.

Repair method:

Replace the stage 2 blade.

Subtask 72-00-53-220-100

AG.

Do an inspection of the leading and trailing edges of each stage 2 blade (01-110 , 72-53-00) or (01-111 , 72-53-00) or (01-112 , 72-53-00) (150B0) as follows. Refer to Figure 807.

(1)

Cracks:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the stage 2 blade.

Subtask 72-00-53-220-101

(2)

Nicks and scratches in area J:

Maximum serviceable limit:

All damage, 0.008 inch (0.20 mm) in depth. Any amount, 0.020 inch (0.51 mm) in depth and 0.060 inch (1.52 mm) in length, if 0.250 inch (6.35 mm) apart.

Repair method:

Replace the stage 2 blade.

Subtask 72-00-53-220-102

(3)

Nicks and scratches in area K:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the stage 2 blade.

Subtask 72-00-53-220-103

(4)

Dents in area J:

Maximum serviceable limit:

0.015 inch (0.38 mm) in depth or out of contour.

Repair method:

Replace the stage 2 blade.

Subtask 72-00-53-220-104

(5)

Dents in area K (this includes the root radius):

Maximum serviceable limit:

Three, 0.008 inch (0.20 mm) in depth or out of contour, and 0.025 inch (0.64 mm) apart, if there is no torn metal, raised metal, or surface distortion other than the dent.

Repair method:

Replace the stage 2 blade.

Subtask 72-00-53-220-105

(6)

Tears:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the stage 2 blade.

Subtask 72-00-53-220-106

(7)

Chipped or missing platinum aluminide coating:

Maximum serviceable limit:

All areas, 0.030 inch (0.76 mm) in diameter, 0.250 inch (6.35 mm) apart, with a total length of 0.15 inch (3.8 mm), if the parent metal is not oxidized.

Repair method:

Replace the stage 2 blade.

Subtask 72-00-53-220-196

(8)

Missing trailing edge:

Maximum serviceable limit:

Total of trailing edge areas J and K: 0.015 inch (0.38 mm) axial length x 0.030 inch (0.76 mm) radial length, with a total radial length of 0.100 inch (2.54 mm).

Repair method:

Replace the stage 2 blade.

Subtask 72-00-53-220-204

(9)

Missing TBC on configuration 1 stage 2 blades (01-111 , 72-53-00) (SIN 150B0) only:

Maximum serviceable limit:

Any amount.

Repair method:

Replace the stage 2 blade.

Subtask 72-00-53-220-107

AH.

Do an inspection of the concave and convex surfaces of each stage 2 blade (01-110 , 72-53-00) or (01-111 , 72-53-00) or (01-112 , 72-53-00) (150B0) as follows. Refer to Figure 807.

(1)

Cracks:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the stage 2 blade.

Subtask 72-00-53-220-108

(2)

Nicks in area J:

Maximum serviceable limit:

All nicks, 0.008 inch (0.20 mm). Any amount, 0.010 inch (0.25 mm) in depth and 0.060 inch (1.52 mm) in length, if 0.250 inch (6.35 mm) apart.

Repair method:

Replace the stage 2 blade.

Subtask 72-00-53-220-109

(3)

Nicks or scratches in area K (this includes the root radius):

Maximum serviceable limit:

Three, 0.008 inch (0.20 mm) in depth, 0.050 inch (1.27 mm) in length, and 0.060 inch (1.52 mm) apart, if there is no torn metal, raised metal, or surface distortion other than the nick or scratch.

Repair method:

Replace the stage 2 blade.

Subtask 72-00-53-220-110

(4)

Dents in area J:

Maximum serviceable limit:

0.020 inch (0.51 mm) in depth, 0.030 inch (0.76 mm) in diameter.

Repair method:

Replace the stage 2 blade.

Subtask 72-00-53-220-111

(5)

Dents in area K (this includes the root radius):

Maximum serviceable limit:

0.008 inch (0.20 mm) in depth or out of contour, 0.025 inch (0.64 mm) apart. Torn metal, raised metal, or surface distortion other than the dent is not permitted.

Repair method:

Replace the stage 2 blade.

Subtask 72-00-53-220-112

(6)

Tears or broken metal:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the stage 2 blade.

Subtask 72-00-53-220-113

(7)

Chipped or missing platinum aluminide coating (no parent metal) on the concave and convex surfaces (this does not include the airfoil root radius):

Maximum serviceable limit:

Any amount above the tip cap.

Repair method:

Replace the stage 2 blade.

Subtask 72-00-53-220-197

(8)

Chipped or missing platinum aluminide coating in the airfoil root radius:

Maximum serviceable limit:

One area, 0.100 inch (2.54 mm) radial length x 0.25 inch (6.4 mm) axial length, not more than 0.15 inch (3.8 mm) above the platform.

Repair method:

Replace the stage 2 blade.

Subtask 72-00-53-220-205

(9)

Missing TBC on configuration 1 stage 2 blades (01-111 , 72-53-00) (SIN 150B0) only:

Maximum serviceable limit:

Any amount.

Repair method:

Replace the stage 2 blade.

Subtask 72-00-53-220-114

AI.

Do an inspection of the tip area of each stage 2 blade (01-110 , 72-53-00) or (01-111 , 72-53-00) or (01-112 , 72-53-00) (150B0) as follows. Refer to Figure 807.

(1)

Cracks:

Maximum serviceable limit:

Two cracks that extend from the top of the blade to the top of the tip cap fillet radius.

Repair method:

Replace the stage 2 blade.

Subtask 72-00-53-220-115

(2)

Bent or curled tips:

Maximum serviceable limit:

Two areas, 0.125 inch (3.18 mm) in length, if the damage is above the tip cap fillet radius.

Repair method:

Replace the stage 2 blade.

Subtask 72-00-53-220-116

(3)

Tears:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the stage 2 blade.

Subtask 72-00-53-220-117

(4)

Chipped or missing platinum aluminide coating:

Maximum serviceable limit:

0.15 inch (3.8 mm) total length on each surface in the area 0.15 inch (3.8 mm) below the blade tip.

Repair method:

Replace the stage 2 blade.

Subtask 72-00-53-220-206

(5)

Missing TBC on configuration 1 stage 2 blades (01-111 , 72-53-00) (SIN 150B0) only:

Maximum serviceable limit:

Any amount.

Repair method:

Replace the stage 2 blade.

Subtask 72-00-53-220-118

AJ.

Do an inspection of the tip cap of each stage 2 blade (01-110 , 72-53-00) or (01-111 , 72-53-00) or (01-112 , 72-53-00) (150B0) as follows. Refer to Figure 807.

(1)

Cracks:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the stage 2 blade.

Subtask 72-00-53-220-119

AK.

Do an inspection of the top surface and edges of the platform (this does not include the root radius) of each stage 2 blade (01-110 , 72-53-00) or (01-111 , 72-53-00) or (01-112 , 72-53-00) (150B0) as follows. Refer to Figure 807.

(1)

Cracks on the sides of the platform on the forward and aft edges:

Maximum serviceable limit:

Any amount, if cracks do not extend into the root radius of the airfoil.

Repair method:

Replace the stage 2 blade.

Subtask 72-00-53-220-120

(2)

Nicks:

Maximum serviceable limit:

0.015 inch (0.38 mm) in depth.

Repair method:

Replace the stage 2 blade.

Subtask 72-00-53-220-121

AL.

Do an inspection of the leading and trailing edge angel wings of each stage 2 blade (01-110 , 72-53-00) or (01-111 , 72-53-00) or (01-112 , 72-53-00) (150B0) as follows. Refer to Figure 807.

(1)

Cracks:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the stage 2 blade.

Subtask 72-00-53-220-122

(2)

Pits:

Maximum serviceable limit:

0.010 inch (0.25 mm) in depth.

Repair method:

Replace the stage 2 blade.

Subtask 72-00-53-220-123

(3)

Circumferential wear groove:

Maximum serviceable limit:

•

OD and ID of leading edge angel wing: Any amount, 0.010 inch (0.25 mm) in depth, if it is not in the fillet radii

•

OD and ID of trailing edge upper angel wing: Not serviceable

•

OD of trailing edge lower angel wing: Any amount, 0.010 inch (0.25 mm) in depth, if it is not in the fillet radii

•

ID of trailing edge lower angel wing: Not serviceable.

Repair method:

Replace the stage 2 blade.

Subtask 72-00-53-220-124

AM.

Do an inspection of the top and bottom of the blade platform (concave side) of stage 2 blades (01-110 , 72-53-00) or (01-111 , 72-53-00) or (01-112 , 72-53-00) (150B0) as follows. Refer to Figure 807.

(1)

Pits:

Maximum serviceable limit:

0.010 inch (0.25 mm) in depth.

Repair method:

Replace the stage 2 blade.

Subtask 72-00-53-220-125

(2)

Bowing:

Maximum serviceable limit:

0.015 inch (0.38 mm) out of contour if there are no cracks.

Repair method:

Replace the stage 2 blade.

Subtask 72-00-53-220-392

AN.

Do an inspection of the root end metering plate of the stage 2 blades (01-110 , 72-53-00) (SIN 150B0) or (01-111 , 72-53-00) (SIN 150B0) or (01-112 , 72-53-00) (SIN 150B0). Refer to Figure 807 and do as follows:

(1)

Cracks in the root plate air entrance holes:

Maximum serviceable limit:

Two cracks, 0.250 inch (6.35 mm) in length, permitted for each air entrance hole.

Repair method:

Replace the stage 2 blade.

Subtask 72-00-53-220-126

AO.

Do an inspection of the seal serrations of the HPT rotor interstage seal (interstage seal) (150B3) as follows. Refer to Figure 808.

(1)

Nicks, dents:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the interstage seal

Subtask 72-00-53-220-200

(2)

Cracks, or cracked out areas:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the interstage seal

Subtask 72-00-53-220-127

(3)

Bending:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the interstage seal.

Subtask 72-00-53-220-128

(4)

Transferred metal on the seal tooth tips or faces:

Maximum serviceable limit:

Any amount.

Repair method:

Replace the interstage seal.

Subtask 72-00-53-220-129

(5)

Wear or missing coating on seal tooth tips and faces:

(a)

If the stage 2 nozzle honeycomb is not replaced:

Maximum serviceable limit:

Any amount, if the parent metal is not exposed.

Repair method:

Replace the interstage seal.

Subtask 72-00-53-220-396

(b)

If the stage 2 nozzle honeycomb is replaced with a pre-run honeycomb, or if the stage 2 nozzle honeycomb has pre-groove grinding performed:

Maximum serviceable limit:

Any amount, 0.500 inch (12.70 mm) in circumferential length, 0.500 inch (12.70 mm) minimum separation, with total length of missing or worn coating on each seal tooth not more than 4.00 inches (101.6 mm). Wear into the parent metal or parent metal exposure is not permitted.

Repair method:

Replace the interstage seal.

Subtask 72-00-53-220-397

(c)

If the stage 2 nozzle honeycomb is replaced with new honeycomb:

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

Repair method:

Pre-groove grind the honeycomb.

Subtask 72-00-53-220-130

AP.

Do an inspection of all other areas on the OD of the interstage seal (150B3) as follows. Refer to Figure 808.

(1)

Nicks, dents, scratches, or other damage:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the interstage seal.

Subtask 72-00-53-220-208

* * * SB 72-0061

AQ.

Do an inspection of the area CW on the outer rim surfaces of the interstage seal (01-170A , 72-53-00) (SIN 150B3) as follows. Refer to Figure 808.

(1)

Missing coating:

Maximum serviceable limit:

Any amount.

Repair method:

Replace the interstage seal.

NOTE:

PRE SB 72-0061 does not require inspection of the interstage seal for missing coating in area CW.

* * * END SB 72-0061

* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01

* * * PRE SB 72-0061( HPT Interstage Seal without Corrosion Resistant Coating - CW Inspection Area )

Figure 808 (Sheet 1 ) Interstage Seal - Inspection

* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01

* * * SB 72-0061( HPT Interstage Seal with Corrosion Resistant Coating - CW Inspection Area )

Figure 808 (Sheet 2 ) Interstage Seal - Inspection

* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01

Figure 808 (Sheet 3 ) Interstage Seal - Inspection

Subtask 72-00-53-220-131

AR.

Do an inspection of the rim OD and end faces of the HPT rotor stage 2 disk (stage 2 disk) (150B1) as follows. Refer to Figure 809.

(1)

Nicks:

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

Any amount, if you can remove the damage with a blend 0.020 inch (0.51 mm) in depth and a minimum radius of 0.25 inch (6.4 mm). No blends permitted in the pressure face areas.

Repair method:

Blend to remove damage. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).

* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01

Figure 809 (Sheet 1 ) Stage 2 Disk - Inspection

* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01

Figure 809 (Sheet 2 ) Stage 2 Disk - Inspection

* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01

Figure 809 (Sheet 3 ) Stage 2 Disk - Inspection

Subtask 72-00-53-220-132

(2)

Dents:

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

0.020 inch (0.51 mm), after the removal of high metal, use a 0.25 inch (6.4 mm) minimum radius blend. No blends permitted in the pressure face areas.

Repair method:

Blend to remove high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).

Subtask 72-00-53-220-133

(3)

Scratches:

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

Any amount, if you can remove the damage with a blend 0.020 inch (0.51 mm) in depth and 0.150 inch (3.81 mm) in length. No blends permitted in the pressure face areas.

Repair method:

Blend to remove damage. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).

Subtask 72-00-53-220-134

(4)

Galling and fretting:

Maximum serviceable limit:

0.005 inch (0.13 mm) in depth.

Maximum repairable limit:

0.010 inch (0.25 mm) in depth and 0.050 inch (1.27 mm) in length.

Repair method:

Blend to remove damage. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).

Subtask 72-00-53-220-135

(5)

Pitting caused by silver corrosion:

NOTE:

Silver corrosion is identified by:

•

Silver staining

•

Green or black deposits

•

Pitted areas.

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

0.005 inch (0.13 mm) in depth after removal of silver corrosion.

Repair method:

Clean the stage 2 disk.

Subtask 72-00-53-220-136

AS.

Do an inspection of the web and hub faces of the stage 2 disk (150B1) as follows. Refer to Figure 809.

(1)

Nicks and scratches 0.25 inch (6.4 mm) or less from any fillet radius:

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

Any amount, if you can remove damage with a blend 0.005 inch (0.13 mm) in depth, use a 0.50 inch (12.7 mm) minimum radius blend.

Repair method:

Blend to remove damage. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES). Polish the repair area to the same finish as the adjacent areas.

Subtask 72-00-53-220-137

(2)

Nicks and scratches in other areas:

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

Any amount, if you can remove damage with a blend 0.005 inch (0.13 mm) in depth and 0.50 inch (12.7 mm) in length. Polish to same finish as adjacent area.

Repair method:

Blend to remove damage. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES). Polish the repair area to the same finish as the adjacent areas.

Subtask 72-00-53-220-138

(3)

Dents:

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

0.005 inch (0.13 mm) in depth, after the removal of high metal, use a 0.50 inch (12.7 mm) minimum radius blend.

Repair method:

Blend to remove high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).

Subtask 72-00-53-220-139

AT.

Do an inspection of area A and area B of the stage 2 disk (01-130 , 72-53-00) (SIN 150B1). Refer to Figure 809 and as follows:

(1)

Nicks, dents, scratches, or other damage:

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

0.003 inch (0.07 mm) in depth, after blend.

Repair method:

Blend. Refer to TASK 72-53-41-300-802 (72-53-41, REPAIR 004) . Rotary flap peening can be used as an alternative for TASK 70-47-01-380-016 (SHOTPEENING) required by TASK 72-53-41-300-802 (72-53-41, REPAIR 004) , Subtask 72-53-41-380-001 (paragraph 5.H.) . Refer to TASK 70-47-04-380-019 (ROTARY FLAP PEENING).

Subtask 72-00-53-220-140

AU.

Do an inspection of area C of the stage 2 disk (01-130 , 72-53-00) (SIN 150B1). Refer to Figure 809 and as follows:

(1)

Nicks, dents, scratches, or other damage:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the stage 2 disk.

Subtask 72-00-53-220-425

AV.

Do an inspection of area D of the stage 2 disk (01-130 , 72-53-00) (SIN 150B1). Refer to Figure 809 and as follows:

(1)

Nicks, dents, scratches or other damage:

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

0.007 inch (0.17 mm) in depth, after blend.

Repair method:

Subtask 72-00-53-220-141

AW.

Do an inspection of all areas of the HPT rotor aft rotating seal (aft rotating seal) (150B4) (this does not include the seal serrations and the air crossover pad) as follows. Refer to Figure 810.

(1)

Cracks:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the aft rotating seal.

Subtask 72-00-53-220-408

AX.

Do an inspection of the accessible internal/external surfaces, area C, on the aft shaft of the stage 2 disk (01-130 , 72-53-00) (SIN 150B1) as follows. Refer to Figure 809.

(1)

Nicks and dents:

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

Not repairable.

Repair method:

Replace the stage 2 disk.

Subtask 72-00-53-220-409

(2)

Scratches:

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

Not repairable.

Repair method:

Replace the stage 2 disk.

* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01

Figure 810 Aft Rotating Seal - Inspection

Subtask 72-00-53-220-142

(3)

Scratches:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the aft rotating seal.

Subtask 72-00-53-220-143

(4)

Nicks and dents:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the aft rotating seal.

Subtask 72-00-53-220-144

AY.

Do an inspection of the seal serrations of the aft rotating seal (150B4) as follows. Refer to Figure 810.

(1)

Nicks, dents:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the aft rotating seal.

Subtask 72-00-53-220-201

(2)

Cracks, or cracked out areas:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the aft rotating seal.

Subtask 72-00-53-220-145

(3)

Bending:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the aft rotating seal.

Subtask 72-00-53-220-146

(4)

Wear or missing coating on tip:

Maximum serviceable limit:

Wear is permitted, if there is no metal discoloration or wear into the metal.

Repair method:

Replace the aft rotating seal.

Subtask 72-00-53-220-198

(5)

Wear or missing coating on face:

Maximum serviceable limit:

Any amount, 0.500 inch (12.70 mm) in length, 0.500 inch (12.70 mm) minimum separation. The total length of missing or worn coating must not be more than 4.00 inches (101.6 mm) for each tooth.

Repair method:

Replace the aft rotating seal.

Subtask 72-00-53-220-147

AZ.

Do an inspection of the outer air holes of the aft rotating seal (150B4) as follows. Refer to Figure 810.

(1)

Damage at the edge radius:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the aft rotating seal.

Subtask 72-00-53-220-149

BA.

Do an inspection of the web of the aft rotating seal (150B4) as follows. Refer to Figure 810.

(1)

Nicks, scratches, and fretting less than 0.250 inch (6.35 mm) from any fillet radius:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the aft rotating seal.

Subtask 72-00-53-220-150

(2)

Nicks and scratches in other areas:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the aft rotating seal.

Subtask 72-00-53-220-151

(3)

Dents:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the aft rotating seal.

Subtask 72-00-53-220-152

BB.

Do an inspection of all other areas on the web OD of the aft rotating seal (150B4) as follows. Refer to Figure 810.

(1)

Nicks, dents, scratches, or other damage:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the aft rotating seal.

Subtask 72-00-53-220-153

BC.

Do an inspection of all areas of the HPT rotor sump seal (sump seal) (01401) as follows. Refer to Figure 811.

(1)

Cracks:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the sump seal.

* * * FOR 1B/P/G03.1B/P/G04.1B/P1/G01

Figure 811 Sump Seal - Inspection

Subtask 72-00-53-220-154

BD.

Do an inspection of all seal serrations of the sump seal (01401) as follows. Refer to Figure 811.

(1)

Turned metal:

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

Any amount, if the total length of blended areas is not more than 2.5 inches (64 mm). Measure the seal serrations at the OD.

Repair method:

Blend. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).

Subtask 72-00-53-220-155

(2)

Nicks, and scratches:

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

Any amount, if you can remove the damage with a blend 0.050 inch (1.27 mm) in depth, 0.50 inch (12.7 mm) in length.

Repair method:

Blend. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).

Subtask 72-00-53-220-156

(3)

Dents:

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

•

0.01 inch (0.3 mm) in depth, after the removal of high metal.

•

Any amount, if you can remove the damage with a blend 0.050 inch (1.27 mm) in depth and 0.50 inch (12.7 mm) in length.

Repair method:

Blend. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).

Subtask 72-00-53-220-157

(4)

Bending:

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

Any amount, if you can remove the damage with a blend 0.50 inch (12.7 mm) in length and 0.050 inch (1.27 mm) in depth.

Repair method:

Blend. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).

Subtask 72-00-53-220-158

BE.

Do an inspection of surface A of the sump seal (01401) as follows. Refer to Figure 811.

(1)

Fretting:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the sump seal.

GE Designated: - CONFIDENTIAL Subject to the restrictions on the media