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

Do a Class A fluorescent penetrant inspection on the vapor barrier, fan cowl PDOS brackets, lower extension support, upper alignment guide, with Class A acceptability limits. Refer to TASK 70-32-02-230-001 (FLUORESCENT PENETRANT INSPECTION).

Subtask 72-21-99-230-002

Do a Class A fluorescent penetrant inspection on the fan bootstrap brackets, cowl support brackets, ground handling mounts upper, and lower firewalls. Refer to TASK 70-32-02-230-001 (FLUORESCENT PENETRANT INSPECTION).

NOTE:

Linear indications are indications that are three times or more in length than they are in width.

•

Ignore indications of 0.03 inch (0.8 mm) or less

•

Indications 0.03-0.06 inch (0.8-1.5 mm) that are not linear, are permitted if they are 0.15 inch (3.8 mm) or more apart

•

No through indications are permitted.

Subtask 72-21-99-230-003

Do a Class B fluorescent penetrant inspection on the weld zones of the FADEC support brackets, lower guide brackets, oil tube support bracket. Refer to TASK 70-32-02-230-001 (FLUORESCENT PENETRANT INSPECTION).

4 .

Post Inspection Procedure.

Subtask 72-21-99-360-001

WARNING:

REFER TO THE PRODUCT LABEL AND THE MANUFACTURER’S (MATERIAL) SAFETY DATA SHEET (SDS) FOR INSTRUCTIONS ON THE HAZARDS, STORAGE, SAFE HANDLING AND PROPER USE OF THIS PRODUCT.

Apply C01-007 RTV 106 to the upper firewall (01-151 , 72-21-00) (SIN 84401) or (01-152 , 72-21-00) (SIN 84401). Refer to Figure 806 and do as follows:

NOTE:

This procedure is only necessary for the upper firewall (01-151 , 72-21-00) (SIN 84401) or (01-152 , 72-21-00) (SIN 84401).

Subtask 72-21-99-110-021

WARNING:

REFER TO THE PRODUCT LABEL AND THE MANUFACTURER’S (MATERIAL) SAFETY DATA SHEET (SDS) FOR INSTRUCTIONS ON THE HAZARDS, STORAGE, SAFE HANDLING AND PROPER USE OF THIS PRODUCT.

(1)

Use C04-035 isopropyl alcohol or equivalent to clean area C and area D of the upper firewall. Refer to TASK 70-21-23-110-053 (CLEANING METHOD NO. 23 - HAND-WIPE DEGREASING).

Subtask 72-21-99-380-001

(2)

Apply C01-159 primer to area C and area D.

Subtask 72-21-99-360-002

(3)

Fill area C and area D with C01-007 RTV 106 to get a smooth transition.

(4)

Do Subtask 72-21-99-110-021 (paragraph 4.A.(1)) thru Subtask 72-21-99-360-002 (paragraph 4.A.(3)) again on the other side of the upper firewall.

Subtask 72-21-99-360-003

WARNING:

REFER TO THE PRODUCT LABEL AND THE MANUFACTURER’S (MATERIAL) SAFETY DATA SHEET (SDS) FOR INSTRUCTIONS ON THE HAZARDS, STORAGE, SAFE HANDLING AND PROPER USE OF THIS PRODUCT.

Apply C01-007 RTV 106 to the lower firewall (01-371 , 72-21-00) (SIN 84501) or (01-372 , 72-21-00) (SIN 84501). Refer to Figure 806 and do as follows:

NOTE:

This procedure is only necessary for the lower firewall (01-371 , 72-21-00) (SIN 84501) or (01-372 , 72-21-00) (SIN 84501).

Subtask 72-21-99-110-022

WARNING:

REFER TO THE PRODUCT LABEL AND THE MANUFACTURER’S (MATERIAL) SAFETY DATA SHEET (SDS) FOR INSTRUCTIONS ON THE HAZARDS, STORAGE, SAFE HANDLING AND PROPER USE OF THIS PRODUCT.

(1)

Use C04-035 isopropyl alcohol or equivalent to clean area H and area L of the lower firewall. Refer to TASK 70-21-23-110-053 (CLEANING METHOD NO. 23 - HAND-WIPE DEGREASING).

Subtask 72-21-99-380-002

(2)

Apply C01-159 primer to area H and area L.

Subtask 72-21-99-360-004

(3)

Fill area H and area L with C01-007 RTV 106 to get a smooth transition.

(4)

Do Subtask 72-21-99-110-022 (paragraph 4.B.(1)) thru Subtask 72-21-99-360-004 (paragraph 4.B.(3)) again on the other side of the lower firewall.

5 .

Visual Inspection.

Subtask 72-21-99-220-001

Do an inspection of the laminated shims and shims as follows. Refer to Figure 801.

(1)

Cracks:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the laminated shims or shims (typical).

Subtask 72-21-99-220-002

(2)

Nicks, dents, and scratches:

Maximum serviceable limit:

Any amount.

Repair method:

Replace the laminated shims or shims (typical).

* * * FOR ALL

Figure 801 Laminated Shims and Shims - Inspection

Subtask 72-21-99-220-003

Do an inspection of the vapor barrier as follows. Refer to Figure 802 and Figure 802A.

(1)

Cracks:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the vapor barrier.

Subtask 72-21-99-220-004

(2)

Burnishing or wear:

Maximum serviceable limit:

0.005 inch (0.13 mm) in depth.

Repair method:

Replace the vapor barrier.

Subtask 72-21-99-220-059

(3)

Nicks, dents, scratches, and gouges:

Maximum serviceable limit:

Any number with a minimal wall thickness of 0.020 inch (0.51 mm), except within 0.25 inch (6.4 mm) of bolt holes which must be 0.042 inch (1.07 mm) minimal wall thickness, after removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .

Repair method:

Replace the vapor barrier.

Subtask 72-21-99-220-005

(4)

Deformation around mounting holes:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the vapor barrier.

* * * FOR ALL

* * * PRE SB 72-0034( Vapor Barrier Made of Titanium )

Figure 802 Vapor Barrier - Inspection

* * * FOR ALL

* * * SB 72-0034( Vapor Barrier Made of Inconel )

Figure 802A Vapor Barrier - Inspection

Subtask 72-21-99-220-009

Do an inspection of the loop clamp. Refer to Figure 803.

(1)

Cracks:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the loop clamp.

Subtask 72-21-99-220-010

(2)

Damaged cushion material:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the loop clamp.

Subtask 72-21-99-220-011

Do an inspection of the upper alignment guides. Refer to Figure 803.

(1)

Cracks:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the upper alignment guide.

Subtask 72-21-99-220-012

(2)

Nicks, dents, and scratches:

Maximum serviceable limit:

Up to 0.010 inch (0.25 mm) in depth.

Repair method:

Replace the upper alignment guide.

Subtask 72-21-99-220-013

Do an inspection of the spacer. Refer to Figure 803.

(1)

Cracks:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the spacer.

Subtask 72-21-99-220-014

(2)

Nicks, dents, and scratches:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the spacer.

Subtask 72-21-99-220-015

(3)

Missing coating:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the spacer.

* * * FOR ALL

Figure 803 Loop Clamp, Spacer, and Upper Alignment Guide - Inspection

Subtask 72-21-99-220-016

Do an inspection of the cowl support brackets, ground handling mounts, fan cowl PDOS brackets, and fan bootstrap brackets as follows. Refer to Figure 804.

(1)

Cracks:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the part.

Subtask 72-21-99-220-017

(2)

Nicks, dents, and scratches:

Maximum serviceable limit:

Maximum repairable limit:

Any amount, 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 72-21-99-220-018

(3)

Loose or missing bushing on the cowl support brackets, ground handling mounts, or fan cowl PDOS brackets:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the part.

Subtask 72-21-99-220-019

(4)

Worn bushing on the cowl support brackets or ground handling mounts:

Maximum serviceable limit:

Any amount, 0.025 inch (0.64 mm) in depth on the outside edges of the bushing, and 0.025 inch (0.64 mm) in depth on 25 percent of the bushing ID or 0.015 inch (0.38 mm) in depth on 100 percent of the bushing ID.

Maximum repairable limit:

Any amount, 0.035 inch (0.89 mm) in depth on the outside edges of the bushing, and 0.035 inch (0.89 mm) in depth on 25 percent of the bushing ID.

Repair method:

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

Subtask 72-21-99-220-020

(5)

Fretting or galling of bearing on cowl support brackets:

Maximum serviceable limit:

Any amount, if in the limits of TASK 70-33-03-220-006 (SPECIAL INSPECTION FOR SURFACE FRETTING OR GALLING) .

Repair method:

Replace the bearing.

Subtask 72-21-99-220-052

(6)

Looseness of bearing on cowl support brackets:

Maximum serviceable limit:

Any amount 0.008 inch (0.20 mm) or less in axial or radial direction.

Repair method:

Replace the cowl support bracket.

Subtask 72-21-99-220-051

(7)

Corrosion on cowl support brackets:

Maximum serviceable limit:

0.060 inch (1.52 mm).

Repair method:

Replace the cowl support bracket.

Subtask 72-21-99-220-021

(8)

Missing or loose locating pin on the ground handling mounts:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the ground handling mount.

Subtask 72-21-99-220-053

(9)

Worn bushing on the fan cowl PDOS brackets:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the part.

* * * FOR ALL

Figure 804 (Sheet 1 ) Cowl Support Brackets, Fan Bootstrap Brackets, Fan Cowl PDOS Brackets, and Ground Handling Mounts - Inspection

* * * FOR ALL

Figure 804 (Sheet 2 ) Cowl Support Brackets, Fan Bootstrap Brackets, Fan Cowl PDOS Brackets, and Ground Handling Mounts - Inspection

Subtask 72-21-99-220-022

Do an inspection of the lower extension support, oil tube support bracket, lower guide brackets, and FADEC support brackets as follows. Refer to Figure 805.

(1)

Cracks:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the bracket.

Subtask 72-21-99-220-023

(2)

Nicks, dents, and scratches:

Maximum serviceable limit:

Any amount, 0.025 inch (0.64 mm) in depth, with no less than 0.50 inch (12.7 mm) between defects after removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) . Apply alodine to the blended surfaces. Refer to TASK 70-43-07-380-007 (CHEMICAL TOUCH-UP SURFACE REFINISHING PROCESS FOR ALUMINUM) .

Maximum repairable limit:

Any amount, 0.050 (1.27 mm) in depth.

Repair method:

Blend. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) . Apply alodine to the blended surfaces. Refer to TASK 70-43-07-380-007 (CHEMICAL TOUCH-UP SURFACE REFINISHING PROCESS FOR ALUMINUM) .

Subtask 72-21-99-220-024

(3)

Missing or loose nut plates of the oil tube support bracket, lower guide brackets, and FADEC support brackets:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the bracket.

Subtask 72-21-99-220-025

(4)

Damaged threads on nut plates of the oil tube support bracket, lower guide brackets, and FADEC support brackets:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the bracket.

Subtask 72-21-99-220-026

(5)

Damaged to self-locking feature on nut plates of the oil tube support bracket, lower guide brackets, and FADEC support brackets:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the bracket.

Subtask 72-21-99-220-027

(6)

Missing or loose rivets on the nut plate of the oil tube support bracket, lower guide brackets, and FADEC support brackets:

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

Any amount.

Repair method:

Replace the rivet. Refer to TASK 70-13-00-390-001 (RIVETED JOINTS).

Subtask 72-21-99-220-064

* * * SB 72-0215( Introduction of Metal Bumper )

Do an inspection of the bumper (01-425 , 72-21-00) (SIN 84518). Refer to Figure 805.

(1)

Cracks:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the bumper.

Subtask 72-21-99-220-065

(2)

Nicks, dents, and scratches:

Maximum serviceable limit:

Any amount, 0.030 inch (0.76 mm) in depth.

Maximum repairable limit:

0.030 inch (0.76 mm) in depth, after the removal of high metal.

Repair method:

Remove the high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) . Apply alodine to the blended surfaces. Refer to TASK 70-43-07-380-007 (CHEMICAL TOUCH-UP SURFACE REFINISHING PROCESS FOR ALUMINUM) .

* * * END SB 72-0215

* * * FOR ALL

Figure 805 (Sheet 1 ) FADEC Support Brackets, Lower Extension Support, Lower Guide Bracket, Oil Tube Support Bracket, and Bumper - Inspection

* * * FOR ALL

Figure 805 (Sheet 2 ) FADEC Support Brackets, Lower Extension Support, Lower Guide Bracket, Oil Tube Support Bracket, and Bumper - Inspection

Subtask 72-21-99-220-028

Do an inspection of the upper firewall and lower firewall as follows. Refer to Figure 806.

(1)

Cracks:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the part.

Subtask 72-21-99-220-029

(2)

Nicks, dents, and scratches:

Maximum serviceable limit:

Any amount, 0.015 inch (0.38 mm) in depth, with no less than 0.50 inch (12.7 mm) between defects after removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .

Maximum repairable limit:

Any amount, 0.032 (0.81 mm) in depth.

Repair method:

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

Subtask 72-21-99-220-060

(3)

Burnishing or wear on lower firewall:

Maximum serviceable limit:

Any amount, 0.003 inch (0.08 mm) in depth.

Repair method:

Replace the lower firewall.

Subtask 72-21-99-220-030

(4)

Missing or loose screw inserts:

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

Any amount.

Repair method:

Replace the screw insert. Refer to TASK 70-48-00-350-015 (THREADED INSERTS) .

Subtask 72-21-99-220-031

(5)

Damaged threads on screw inserts:

Maximum serviceable limit:

Any amount.

Repair method:

Replace the screw insert. Refer to TASK 70-48-00-350-015 (THREADED INSERTS) .

Subtask 72-21-99-220-032

(6)

Missing or loose locking rings:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the locking ring.

Subtask 72-21-99-220-033

(7)

Damaged threads on nut plates

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the firewall.

Subtask 72-21-99-220-034

(8)

Missing or loose rivet on nut plates:

Maximum serviceable limit:

Not serviceable.

Maximum repairable limit:

Any amount.

Repair method:

Replace the rivet. Refer to TASK 70-13-00-390-001 (RIVETED JOINTS).

* * * FOR ALL

Figure 806 (Sheet 1 ) Upper Firewall and Lower Firewall - Inspection

* * * FOR ALL

Figure 806 (Sheet 2 ) Upper Firewall and Lower Firewall - Inspection

* * * FOR ALL

Figure 806 (Sheet 3 ) Upper Firewall and Lower Firewall - Inspection

* * * FOR ALL

Figure 806 (Sheet 4 ) Upper Firewall and Lower Firewall - Inspection

Subtask 72-21-99-220-035

Do an inspection of the lower seal as follows. Refer to Figure 807.

(1)

Cracks:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the lower seal.

Subtask 72-21-99-220-036

(2)

Missing or damaged material:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the lower seal.

Subtask 72-21-99-220-037

Do an inspection of each OGV panel and each fillet fairing as follows. Refer to Figure 807, Figure 807A, Figure 808, Figure 808A, and Figure 809.

(1)

Cracks:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the part.

Subtask 72-21-99-220-038

(2)

Nicks and scratches:

Maximum serviceable limit:

Any amount.

Repair method:

Replace the part.

Subtask 72-21-99-220-039

(3)

Dents, holes, or punctures:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the part.

Subtask 72-21-99-220-040

(4)

Delamination on the corners of the OGV panels or fairing fillets:

Maximum serviceable limit:

Any amount, not more than 0.5 sq in. (323 sq mm).

Repair method:

Replace the part.

Subtask 72-21-99-220-041

(5)

Delamination on all other areas of each OGV panels or fairing fillets:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the part.

Subtask 72-21-99-220-042

(6)

Missing plates, rivets and nut plates on the OGV panels:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the OGV panel.

Subtask 72-21-99-220-043

(7)

Damaged threads on nut plates on the OGV panels:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the OGV panel.

Subtask 72-21-99-220-044

(8)

Self-locking feature on nut plates on the OGV panels:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the OGV panel.

Subtask 72-21-99-220-054

* * * PRE SB 72-0021( OGV Panels Made of Phenolic Resin )

(9)

Cratering or hole breakout on the OGV panels:

Maximum serviceable limit:

Any number if the total accumulated area does not exceed 0.062 inch x 0.062 inch (1.57 mm x 1.57 mm) in any 1.00 sq in. (645.2 sq mm) and 0.010 inch (0.25 mm) maximum height.

Repair method:

Replace the OGV panel.

NOTE:

Inspection for cratering or hole breakout on the OGV panels does not apply for service bulletin 72-0021 condition.

Subtask 72-21-99-220-055

(10)

Blocked or partially filled holes in facesheet over bond joints on the OGV panels:

Maximum serviceable limit:

Any amount.

Repair method:

Replace the OGV panel.

NOTE:

Inspection for the blocked or partially filled holes in facesheet over bond joints on the OGV panels does not apply for service bulletin 72-0021 condition.

Subtask 72-21-99-220-056

(11)

Blocked or partially filled holes in the acoustic area on the OGV panels:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the OGV panel.

NOTE:

Inspection for blocked or partially filled holes in the acoustic area on the OGV panels does not apply for service bulletin 72-0021 condition.

* * * END PRE SB 72-0021

Subtask 72-21-99-220-061

* * * SB 72-0021( OGV Panels Made of Carbon Fabric )

(12)

Surface porosity on the OGV panel:

Maximum serviceable limit:

Any amount, if the porosity does not extend below the midpoint of the exterior ply.

Repair method:

Replace the OGV panel.

NOTE:

Surface porosity on the OGV panel is a surface condition in which pin holes or pits can be found in the surface resin only, but fibers cannot be seen.

NOTE:

Inspection for surface porosity on the OGV panel does not apply for PRE service bulletin 72-0021 condition.

Subtask 72-21-99-220-062

(13)

Use a steel rod, 0.375 inch (9.53 mm) in diameter and 2.00 inches (50.8 mm) in length, with a round end to tap on the stiffening cap in the damaged area while listening for clicking sounds.

•

If a solid sound is heard, the area does not have a delamination

•

If a hollow or dull sound is heard, the area has a delamination. Refer to Subtask 72-21-99-220-063, (paragraph 4.J.(14)).

Subtask 72-21-99-220-063

(14)

Delamination in the OGV panel:

Maximum serviceable limit:

Three indications. Each indication cannot be more than 0.500 sq in. (322.6 sq mm) equivalent area and must be separated by 0.003 inch (0.08 mm).

Repair method:

Replace the OGV panel.

NOTE:

Inspection for delamination in the OGV panel does not apply for PRE service bulletin 72-0021 condition.

* * * END SB 72-0021( )

* * * FOR ALL

* * * PRE SB 72-0021( OGV Panels Made of Phenolic Resin )

Figure 807 Lower Right and Left OGV Panels - Inspection

* * * FOR ALL

* * * SB 72-0021( OGV Panels Made of Carbon Fabric )

Figure 807A Lower Right and Left OGV Panels - Inspection

* * * FOR ALL

* * * PRE SB 72-0021( OGV Panels Made of Phenolic Resin )

Figure 808 Upper Right and Left OGV Panels - Inspection

* * * FOR ALL

* * * SB 72-0021( OGV Panels Made of Carbon Fabric )

Figure 808A Upper Right and Left OGV Panels - Inspection

* * * FOR ALL

Figure 809 Upper and Lower Fillet Fairings - Inspection

Subtask 72-21-99-220-045

Do an inspection of each bolt and each screw for. Refer to Figure 810.

(1)

Cracks:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the bolt or screw.

Subtask 72-21-99-220-046

(2)

Damaged head on bolts or screws:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the bolt or screw.

Subtask 72-21-99-220-047

Do an inspection of each self-locking nut for:

(1)

Thread damage:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the self-locking nut.

Subtask 72-21-99-220-048

(2)

Loss of self-locking quality:

Maximum serviceable limit:

Run-on torque must be 4.0 lb in. (0.45 N.m) or more.

Repair method:

Replace the self-locking nut.

* * * FOR ALL

Figure 810 (Sheet 1 ) Bolts, Screw, Self-Locking Nuts, Torx Bolts, and 12PT Head Bolt - Inspection

* * * FOR ALL

Figure 810 (Sheet 2 ) Bolts, Screw, Self-Locking Nuts, Torx Bolts, and 12PT Head Bolt - Inspection

Subtask 72-21-99-220-050

Do an inspection of each washer and sleeve spacer for. Refer to Figure 811.

(1)

Cracks:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the washer or sleeve spacer.

Subtask 72-21-99-220-057

Do an inspection of each axe link mount. Refer to Figure 811.

(1)

Cracks:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the axe link mounts.

Subtask 72-21-99-220-058

(2)

Damaged head:

Maximum serviceable limit:

Not serviceable.

Repair method:

Replace the axe link mounts.

Subtask 72-21-99-220-073

* * * PRE SB 72-0021

Do an inspection of the OGV panels (01-160 , 72-21-00) (SIN 84402), (01-170 , 72-21-00) (SIN 84403), (01-380 , 72-21-00) (SIN 84502), and (01-390 , 72-21-00) (SIN 84503). Refer to Figure 807 and Figure 808.

(1)

Wear around the countersink holes of the OGV panels:

Maximum serviceable limit:

Any amount, with hole diameter that is not more than 0.27 inch (6.85 mm).

Repair method:

Repair. Refer to TASK 72-21-99-300-801 (72-21-99, REPAIR 001).

* * * END PRE SB 72-0021

Subtask 72-21-99-220-074

* * * SB 72-0021

Do an inspection of the OGV panels (01-160 , 72-21-00) (SIN 84402), (01-170 , 72-21-00) (SIN 84403), (01-380 , 72-21-00) (SIN 84502), and (01-390 , 72-21-00) (SIN 84503).

(1)

Wear around the countersink holes of the lower OGV panels (01-380 , 72-21-00) (SIN 84502) and (01-390 , 72-21-00) (SIN 84503). Refer to Figure 807.

Maximum serviceable limit:

Any amount, with hole diameter that is not more than 0.276 inch (7.01 mm).

Repair method:

Repair. Refer to TASK 72-21-99-300-801 (72-21-99, REPAIR 001).

Subtask 72-21-99-220-075

(2)

Wear around the countersink holes of the upper OGV panels (01-160 , 72-21-00) (SIN 84402) and (01-170 , 72-21-00) (SIN 84403). Refer to Figure 808.

Maximum serviceable limit:

Any amount, with hole diameter that is not more than 0.271 inch (6.88 mm).

Repair method:

Repair. Refer to TASK 72-21-99-300-801 (72-21-99, REPAIR 001).

* * * END SB 72-0021

Subtask 72-21-99-220-076

* * * SB 72-0233

(1)

Wear around the countersink holes of the OGV panels:

Maximum serviceable limit:

Any amount, with hole diameter that is not more than 0.271 inch (6.88 mm).

Repair method:

Repair. Refer to TASK 72-21-99-300-801 (72-21-99, REPAIR 001).

* * * END SB 72-0233

* * * FOR ALL

Figure 811 Axe Link Mounts, Flat Washers, Sleeve Spacer - Inspection

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