* * * FOR ALL
TASK 72-00-02-200-801
1 . General.
A.This procedure gives instructions to do an inspection of the propulsor assembly (0010C). Refer to Figure 801. You must do this inspection before you install:
•
A propulsor assembly after a maintenance procedure(s)
•
A replacement propulsor assembly
•
A propulsor assembly that you removed to do an inspection or maintenance procedure on other components.
B.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.
C.If you do this procedure and find unserviceable conditions for an assembly or part, refer to the applicable section of the engine manual for more disassembly and inspection procedures for the assembly or part.
D.If you will fully disassemble the propulsor assembly, this procedure is not necessary. Refer to the applicable section of the engine manual for the inspection procedure for each part.
E.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.
  F.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.
A.Tools and Equipment.
(1)Special Tools. None.
(2)Standard Tools and Equipment. None.
(3)Locally Manufactured Tools. None.
B.Consumable Materials. None.
C.Referenced Procedures.
 
ATA No.
Description
 
05-21-00
Life Limits 001
 
70-21-01
Cleaning Method 1 - Solvent Degreasing
 
70-21-03
Cleaning Method 3 - Steam Cleaning
 
70-32-03
Spot-Fluorescent Penetrant Inspection
 
70-42-00
Blending And Removal Of High Metal Procedures
 
72-00-00
Inspection 001
D.Expendable Parts. None.
* * * FOR ALL
Figure 801   (Sheet 1 ) Propulsor Assembly - Inspection
* * * FOR ALL
Figure 801   (Sheet 2 ) Propulsor Assembly - Inspection
* * * FOR ALL
Figure 801   (Sheet 3 ) Propulsor Assembly - Inspection
* * * FOR ALL
Figure 801   (Sheet 4 ) Propulsor Assembly - Inspection
3 . Specific Inspection Procedure.
Subtask 72-00-02-230-001
A.If the visual inspection or other conditions make it necessary, do a spot-fluorescent penetrant inspection. Refer to TASK 70-32-03-230-002 (SPOT-FLUORESCENT-PENETRANT INSPECTION).
4 . Visual Inspection.
Subtask 72-00-02-220-001
A.Do an inspection of all visible areas of the stage 1 fan disk (fan disk) (830A0) of the fan booster assembly (80000) as follows. Refer to Figure 801 and Figure 802.
(1)Cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the fan booster assembly.
* * * FOR ALL
Figure 802   Fan Disk - Inspection
Subtask 72-00-02-220-099
(2)Discoloration that is a result of a shotpeen procedure (rust color):
Maximum serviceable limit:
Any amount.
Repair method
Replace the fan booster assembly.
Subtask 72-00-02-220-100
(3)Nicks, dents, and scratches (this does not include the retainer grooves or web areas):
Maximum serviceable limit:
• Any amount, 0.004 inch (0.10 mm) in depth, 0.020 inch (0.51 mm) in width, if the damage is not in area B.
• Deleted.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-200
(4)Nicks, dents, and scratches in area B (do not include the web areas). Refer to Figure 802.
Maximum serviceable limit:
Visual defects with the appearance of scratches, nicks, dents, and other surface conditions of 0.001 inch (0.02 mm) in depth are permitted, if there is no adjacent high metal and there is a shotpeened surface on the visual condition.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-101
(5)Nicks, dents, and scratches in the web areas:
Maximum serviceable limit:
• Any amount, 0.004 inch (0.10 mm) in depth, 0.020 inch (0.51 mm) in width, if the damage is more than 0.50 inch (12.7 mm) away from the fan disk bore
• No damage is permitted less than 0.50 inch (12.7 mm) away from the fan disk bore
• The minimum distance between damaged areas on a web surface is 2.00 inches (50.8 mm).
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-102
(6)Nicks, dents, scratches, and fretting (in the retainer grooves only):
Maximum serviceable limit:
Any amount, 0.003 inch (0.08 mm) in depth.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-002
B.Do an inspection of the boltholes in the spinner flange of the fan disk (830A0) as follows. Refer to Figure 802.
(1)Cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-003
(2)Galling and scratches:
Maximum serviceable limit:
0.002 inch (0.05 mm) in depth after the removal of high metal, if the galling or scratches are not on more than 50 percent of the circumference of each hole. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-004
C.Do an inspection of the dovetail slots of the fan disk (830A0) as follows. Refer to Figure 802.
(1)Nicks, dents, scratches, and fretting on the pressure faces:
Maximum serviceable limit:
0.003 inch (0.08 mm) in depth, if the damage is not on more than 60 percent of the pressure face.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-103
(2)Nicks, dents, scratches, and fretting on the radius below and adjacent to the pressure faces:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-104
(3)Nicks, dents, scratches, and fretting on the bottom of the dovetail slots:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-201
(4)Foreign material embedment on the bottom of the dovetail slot bottom from the contact with fan blade spacer wear strip:
NOTE:
At the bottom of the dovetail slot there is a manufacturing mismatch that is a typical condition. For details, refer to Figure 804.
Maximum serviceable limit:
Any amount.
Repair method:
Not applicable.
Subtask 72-00-02-220-105
(5)Nicks, dents, and scratches on the corners of the leading and trailing edges of the dovetail:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-005
D.Do an inspection of the flanges and mating faces of the fan disk (830A0) as follows. Refer to Figure 802.
(1)Cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-006
(2)Nicks, dents, and scratches:
Maximum serviceable limit:
Any amount less than 0.001 inch (0.03 mm) in depth, after the removal of high metal.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-007
(3)Fretting:
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 fan booster assembly.
Subtask 72-00-02-220-009
E.Do an inspection of areas of the booster spool (830AH) that you can see as follows. Refer to Figure 803.
(1)Cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the fan booster assembly.
* * * FOR ALL
Figure 803   (Sheet 1 ) Fan Booster Assembly - Inspection
* * * FOR ALL
Figure 803   (Sheet 2 ) Fan Booster Assembly - Inspection
* * * FOR ALL
Figure 804   Embedment on the Bottom of the Dovetail Slot Bottom
Subtask 72-00-02-220-011
F.Do an inspection of all visible areas of the flowpath spacer (830AM) (this does not include area AA and the booster spool mounting flange) as follows. Refer to Figure 803 and Figure 805.
(1)Cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-185
(2)Nick, Dents, Scratches, and Pits:
Maximum serviceable limit:
0.003 inch (0.08 mm) in depth, if the defects are not more than 0.5 inch (13 mm) in diameter or length 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 fan booster assembly.
* * * FOR ALL
Figure 805   Flowpath Spacer - Inspection
Subtask 72-00-02-220-013
G.Do an inspection of Area AA that you can see on the flowpath spacer (830AM) as follows. Refer to Figure 805.
(1)Nicks, dents, scratches, and pits:
Maximum serviceable limit:
Any amount, 0.006 inch (0.15 mm) in depth.
Repair method:
Replace the spacer.
Subtask 72-00-02-220-186
(2)Fretting and wear:
Maximum serviceable limit:
Any amount less than 0.001 inch (0.03 mm) in depth after the removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Maximum repairable limit
Any amount, 0.006 inch (0.15 mm) in depth.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-202
G.A.Do an inspection of area F of the flowpath spacers (01-060 , 72-22-00) (SIN 830AM). Refer to Figure 818.
(1)Erosion in the glass fiber erosion layer or carbon fiber layer:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-22-43-300-802 (72-22-43, REPAIR 002) .
Subtask 72-00-02-220-203
(2)Gouges, cuts, or scratches in the glass fiber erosion layer:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-22-43-300-802 (72-22-43, REPAIR 002) .
Subtask 72-00-02-220-018
H.Do an inspection of area AA of the inlet guide vane (vane) assembly (837A0) as follows. Refer to Figure 806.
(1)Cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the fan booster assembly.
* * * FOR ALL
Figure 806   Vane Assembly - Inspection
Subtask 72-00-02-220-106
(2)Nicks and dents:
Maximum serviceable limit:
Any amount, 0.01 inch (0.3 mm) in depth and not less than 0.375 inch (9.53 mm) between each one. Sharp grooves are not permitted.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-107
(3)Scratches:
Maximum serviceable limit:
Any amount, 0.01 inch (0.3 mm) in depth, and not less than 0.375 inch (9.53 mm) between each scratch. Sharp grooves are not permitted.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-019
I.Do an inspection of area BA of the vane assembly (837A0) as follows. Refer to Figure 806.
(1)Cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-108
(2)Nicks and dents:
Maximum serviceable limit:
Any amount, 0.009 inch (0.23 mm) in depth.
Maximum repairable limit:
Repair method:
Blend to the trailing edge adjacent contour. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Subtask 72-00-02-220-109
(3)Tears:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-110
(4)Local distortion:
Maximum serviceable limit:
Any amount, not more than 0.03 inch (0.8 mm) radially, and not more than 0.3 inch (8 mm) longitudinally.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-111
(5)Scratches:
Maximum serviceable limit:
Any amount, 0.009 inch (0.23 mm) in depth and not less than 0.375 inch (9.53 mm) between each scratch. Sharp grooves are not permitted.
Maximum repairable limit:
Repair method:
Blend to the trailing edge adjacent contour. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Subtask 72-00-02-220-098
J.Do an inspection of area CA of the vane assembly (837A0) as follows. Refer to Figure 806.
(1)Cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-112
(2)Nicks and dents:
Maximum serviceable limit:
Any amount, 0.002 inch (0.05 mm) in depth.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-113
(3)Tears:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-114
(4)Local distortion:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-115
(5)Scratches:
Maximum serviceable limit:
Any amount, 0.002 inch (0.05 mm) in depth and not less than 0.375 inch (9.53 mm) between each scratch. Sharp grooves are not permitted.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-020
K.Do an inspection of the outer shroud of the vane assembly (837A0) as follows. Refer to Figure 806.
(1)Cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-119
(2)Nicks, dents, and scratches on the forward ledge:
Maximum serviceable limit:
Any amount, 0.008 inch (0.20 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 fan booster assembly.
Subtask 72-00-02-220-122
(3)Fretting on the forward ledges:
Maximum serviceable limit:
Any amount, in the limits of TASK 70-33-03-220-006 (SPECIAL INSPECTION FOR SURFACE FRETTING OR GALLING) .
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-123
(4)Damaged insert:
Maximum serviceable limit:
Not serviceable.
Maximum repairable limit:
Any amount.
Repair method:
Replace the insert. Refer to TASK 70-48-11-350-014 (INSTALLATION OF KEY-LOCKED INSERTS) .
Subtask 72-00-02-220-021
L.Do an inspection of the areas you can see on each of the booster stages 2 thru 5 blades (blades) as follows. Refer to Figure 803 and Figure 807.
(1)Cracks or tears:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the fan booster assembly.
* * * FOR ALL
Figure 807   Blade - Inspection
Subtask 72-00-02-220-022
M.Do an inspection of area A of each of the blades that you can see as follows. Refer to Figure 807.
(1)Nicks and/or dents on concave or convex sides:
Maximum serviceable limit:
Any amount, 0.001 inch (0.03 mm) in depth, 0.124 inch (3.15 mm) in length.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-136
(2)Nicks and/or dents on the leading edges:
Maximum serviceable limit:
Any amount, 0.005 inch (0.13 mm) in depth.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-137
(3)Local distortion on the leading or trailing edges:
Maximum serviceable limit:
0.010 inch (0.25 mm) from the initial contour on the leading edge. None permitted on the trailing edge.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-138
(4)Scratches:
Maximum serviceable limit:
Any amount, 0.005 inch (0.13 mm) in depth.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-023
N.Do an inspection of area B of each of the blades that you can see as follows. Refer to Figure 807.
(1)Nicks and dents:
Maximum serviceable limit:
Any amount, 0.005 inch (0.13 mm) in depth.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-139
(2)Scratches:
Maximum serviceable limit:
Any amount, 0.005 inch (0.13 mm) in depth.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-140
(3)Tears (high metal):
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-141
(4)Local distortion on the leading and/or trailing edge:
Maximum serviceable limit:
0.02 inch (0.5 mm) from the initial contour.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-142
O.Do an inspection of area D of each of the blades that can be seen as follows. Refer to Figure 807.
(1)Missing blade tip corner:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-143
(2)Tip curl:
Maximum serviceable limit:
Both corners of blade tip. Tip curl must not extend across more than 0.05 inch (1.3 mm) of the leading or trailing edge of the blade tip.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-196
(3)Nicks and dents:
Maximum serviceable limit:
Any amount, 0.005 inch (0.13 mm) in depth.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-197
(4)Scratches:
Maximum serviceable limit:
Any amount, 0.005 inch (0.13 mm) in depth.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-198
(5)Tears (high metal):
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-024
P.Do an inspection of area C of each of the blades you can see as follows. Refer to Figure 807.
(1)Nicks, dents, and scratches:
Maximum serviceable limit:
Any amount, 0.004 inch (0.10 mm) in depth, 0.118 inch (3.00 mm) in length, 0.118 inch (3.00 mm) in diameter.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-025
Q.Do an inspection of each platform of the blades you can see as follows. Refer to Figure 807.
(1)Nicks, dents, and scratches:
Maximum serviceable limit:
Any amount, 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) .
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-026
(2)Rub marks on edge:
Maximum serviceable limit:
Any amount, 0.006 inch (0.15 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 fan booster assembly.
Subtask 72-00-02-220-031
R.Do an inspection of the fan hub frame assembly (84000) as follows.
(1)Cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-144
(2)Dents:
Maximum serviceable limit:
Any amount 0.12 inch (3.0 mm) in depth, if the dents have a smooth contour and there is at least 6.0 inches (152 mm) between them.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-145
(3)Cracks in the webs of the clevis on the thrust link:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-146
(4)Cracks in the clevis bosses of the thrust link:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the fan booster assembly.
Subtask 72-00-02-220-032
(5)Nicks, scratches, and gouges in the engine mount bosses and webs:
Maximum serviceable limit:
Not serviceable.
Maximum repairable limit:
Any amount, if the blend is not more than 0.015 inch (0.38 mm) in depth with a 0.25 inch (6.4 mm) radius.
Repair method:
Blend to remove the damage. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Subtask 72-00-02-220-033
(6)Missing locking feature in each threaded insert:
Maximum serviceable limit:
Not serviceable.
Maximum repairable limit:
Any amount.
Repair method:
Replace the threaded insert.
Subtask 72-00-02-220-147
(7)Damaged threads on each threaded insert:
Maximum serviceable limit:
Not more than 1 full thread missing after removal of high metal. Blend to remove high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Maximum repairable limit:
Any amount.
Repair method:
Replace the threaded insert.
Subtask 72-00-02-220-148
(8)Damaged threads on each stud:
Maximum serviceable limit:
Not more than 1 full thread missing after removal of high metal. Blend to remove high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Maximum repairable limit:
Any amount.
Repair method:
Replace the stud.
Subtask 72-00-02-220-035
S.Do an inspection of each variable bypass door (door) (840B0) as follows.
(1)Cracks in the body of the door:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the door.
Subtask 72-00-02-220-036
(2)Nicks and scratches:
Maximum serviceable limit:
Any amount 0.015 inch (0.38 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 door.
Subtask 72-00-02-220-038
T.Do an inspection of each variable bypass hood (hood) (840B2) as follows.
(1)Tears and holes in the seal:
Maximum serviceable limit:
Any amount not more than 0.50 inch (12.7 mm) in length.
Repair method:
Replace the hood.
Subtask 72-00-02-220-159
(2)cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the hood.
Subtask 72-00-02-220-150
(3)Frayed edges:
Maximum serviceable limit:
Any amount not more than 0.75 inch (19.1 mm) in length.
Repair method:
Replace the hood.
Subtask 72-00-02-220-151
(4)Disbonded seals:
Maximum serviceable limit:
Any amount.
Repair method:
Replace the hood.
Subtask 72-00-02-220-039
U.Do an inspection of each actuator bellcrank (bellcrank) (840BD) and each bypass door bellcrank (bellcrank) (840B9) as follows.
(1)Cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the bellcranck.
Subtask 72-00-02-220-040
(2)Nicks and scratches on the bellcrank (840B9):
Maximum serviceable limit:
Any amount not more than 0.015 inch (0.38 mm) in depth after the removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Maximum repairable limit:
Any amount not more than 0.030 inch (0.76 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:
Blend. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Subtask 72-00-02-220-041
(3)Nicks and scratches on the bellcrank (840BD):
Maximum serviceable limit:
Any amount not more than 0.015 inch (0.38 mm) in depth after the removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Maximum repairable limit:
Any amount not more than 0.030 inch (0.76 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:
Blend. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Subtask 72-00-02-220-042
(4)Loose bearing:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the bellcrank.
Subtask 72-00-02-220-187
V.Do an inspection of the bellcrank door bracket assembly (840BA) as follows. Refer to Figure 808.
NOTE:
Use a light and mirror or boresecope, to inspect a minimum of four installed VBV bellcrank brackets on the inboard surface, where spindle protrudes through bushing.
(1)Cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the bellcrank door bracket assembly.
Subtask 72-00-02-220-188
(2)Worn bushings:
Maximum serviceable limit:
Any amount, not more than 50 percent of bushing thickness 0.35 inch (8.9 mm).
Repair method:
Replace the bracket or bushings.
Subtask 72-00-02-220-043
W.Do an inspection of each rod end plain bearing (bearing) (840BC) as follows.
(1)Loose bearings:
Maximum serviceable limit:
Any amount, if there is not more than 0.001 inch (0.03 mm) axial movement.
Repair method:
Replace the ball or bearing assembly.
Subtask 72-00-02-220-044
X.Do an inspection of the unison ring (840B6) as follows.
(1)Cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the unison ring.
Subtask 72-00-02-220-045
(2)Nicks, dents, and scratches:
Maximum serviceable limit:
Any amount not more than 0.005 inch (0.13 mm) in depth.
Maximum repairable limit:
Any amount not more than 0.010 inch (0.25 mm) in depth.
  Repair method:
Blend. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) . Surface-treat the bare aluminum area. Refer to TASK 70-43-07-380-007 (CHEMICAL TOUCH-UP SURFACE REFINISHING PROCESS FOR ALUMINUM) .
Subtask 72-00-02-220-048
Y.Do an inspection of each actuator clevis (840B7) and bypass door clevis (840BB) as follows.
(1)Cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the part.
Subtask 72-00-02-220-049
(2)Nicks and scratches:
Maximum serviceable limit:
Any amount, 0.015 inch (0.38 mm) in depth.
Maximum repairable limit:
Any amount, 0.030 inch (0.76 mm) in depth.
Repair method:
Blend. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) . Touch up the repaired areas. Refer to TASK 70-43-08-380-008 (CHEMICAL FILM COATING FOR ALUMINUM) .
Subtask 72-00-02-220-050
(3)Inserts that are loose, missing, or have damaged threads:
Maximum serviceable limit:
Not serviceable.
Maximum repairable limit:
Not repairable.
Repair method:
Replace the insert. Refer to TASK 70-48-11-350-014 (INSTALLATION OF KEY-LOCKED INSERTS) .
Subtask 72-00-02-220-189
Z.Do an inspection of each IGV bridge connector (071E0) as follows.
(1)Cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the IGV bridge connector.
Subtask 72-00-02-220-190
(2)Nicks, dents, and scratches:
Maximum serviceable limit:
Any amount 0.005 inch (0.13 mm) in depth 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 0.015 inch (0.38 mm) in depth.
Repair method:
Blend. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
* * * FOR ALL
Figure 808   (Sheet 1 ) Variable Bleed System - Inspection
* * * FOR ALL
Figure 808   (Sheet 2 ) Variable Bleed System - Inspection
Subtask 72-00-02-220-051
CAUTION:
MAKE SURE A SPECIAL INSPECTION OF THE COMPRESSOR ROTOR BLADES IS DONE IF THERE IS A VANE SCHEDULING ERROR OF MORE THAN FOUR DEGREES.
AA.Do an inspection of all areas of each IGV arm (071D0) as follows. Refer to Figure 809.
(1)Cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the IGV arm.
* * * FOR ALL
Figure 809   IGV Lever Arm - Inspection
Subtask 72-00-02-220-153
(2)Distortion:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the IGV arm.
Subtask 72-00-02-220-160
(3)Nicks, dents, and scratches on the external contour of the lever arm (areas G and H):
Maximum serviceable limit:
Any amount 0.003 inch (0.08 mm) in depth for area G, none permitted for area H, after removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Maximum repairable limit:
Area G 0.005 inch (0.13 mm) and, area H 0.001 inch (0.03 mm).
Repair method:
Blend to remove the defect. The final blend depth must not be more than the maximum repairable limit. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Subtask 72-00-02-220-052
AB.Do an inspection of each pin on the IGV arms (071D0) as follows.
(1)Distortion:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the lever arm.
Subtask 72-00-02-220-154
(2)Looseness of the heads:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the lever arm.
Subtask 72-00-02-220-164
AC.Do an inspection of each IGV actuating ring (071A0, 071A5) as follows. Refer to Figure 810.
(1)Cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the actuating ring.
* * * FOR ALL
Figure 810   IGV Actuating Ring - Inspection
Subtask 72-00-02-220-165
(2)Nicks and scratches:
Maximum serviceable limit:
Any amount not more than 0.005 inch (0.13 mm) in depth, after the removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Maximum repairable limit:
Any amount not more than 0.010 (0.25 mm) in depth.
Repair method:
Remove the nicks and scratches with a blend procedure. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Subtask 72-00-02-220-166
(3)Distortion (bent or twisted):
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the actuating ring
Subtask 72-00-02-220-167
(4)Spacer button wear:
Maximum serviceable limit:
Any amount not more than 0.010 inch (0.25 mm).
Repair method:
Replace the actuating ring
Subtask 72-00-02-220-053
AD.Do an inspection of each variable bypass door seal (door seal) (840N0) as follows.
(1)Tears and holes in the door seal:
Maximum serviceable limit:
Any amount not more than 0.50 inch (12.7 mm) in length.
Repair method:
Replace the door seal.
Subtask 72-00-02-220-156
(2)Cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the door seal.
Subtask 72-00-02-220-157
(3)Frayed edges:
Maximum serviceable limit:
Any amount not more than 0.75 inch (19.1 mm) in length.
Repair method:
Replace the door seal.
Subtask 72-00-02-220-158
(4)Disbonded seals:
Maximum serviceable limit:
Any amount.
Repair method:
Replace the door seal.
Subtask 72-00-02-220-054
AE.Do an inspection of the HPC stator forward case assembly (forward case assembly) (073A0) of the HPC assembly (00108) as follows. Refer to Figure 801 and Figure 811.
(1)Cracks in the outer surface (skin):
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the HPC assembly.
* * * FOR ALL
Figure 811   (Sheet 1 ) Forward Case Assembly - Inspection
* * * FOR ALL
Figure 811   (Sheet 2 ) Forward Case Assembly - Inspection
Subtask 72-00-02-220-056
(2)Cracks in the horizontal and circumferential flanges:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the HPC assembly.
Subtask 72-00-02-220-057
(3)Loose, broken, or missing nuts and bolts:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the nut or bolt.
Subtask 72-00-02-220-058
(4)Discoloration (hot spots) on all surfaces:
Maximum serviceable limit:
Any amount, if the metal is not crazed and there are no related cracks.
Repair method:
Replace the HPC assembly.
Subtask 72-00-02-220-194
(5)Damaged insert threads on the mounting pads or bosses:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the self-locking insert. Refer to TASK 72-32-01-300-802 (72-32-01, REPAIR 002).
Subtask 72-00-02-220-193
AF.Do an inspection of the machine bolts (bolt) (07320) in the unused forward case assembly mounting bosses (case bosses) as follows. Refer to Figure 811.
(1)Loose, broken, or missing bolts in case bosses:
Maximum serviceable limit:
Not serviceable.
Maximum repairable limit:
Any amount.
Repair method:
Install a new bolt or torque loose bolt to 106-124 lb in. (12.0-14.0 N.m).
Subtask 72-00-02-220-195
(2)Damaged insert threads on the bosses:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the self-locking insert. Refer to TASK 72-32-01-300-802 (72-32-01, REPAIR 002).
Subtask 72-00-02-220-059
AG.Do an inspection of the HPC stator extension case (extension case) (080AL) as follows. Refer to Figure 812.
(1)Nicks, pits, scores, and scratches on all surfaces:
Maximum serviceable limit:
Any amount, any length, 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) .
Maximum repairable limit:
Any amount, any length, 0.020 inch (0.51 mm) in depth, if the radius at the bottom of the blend is a minimum of 0.050 inch (1.27 mm).
Repair method:
Blend to remove the damage. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Subtask 72-00-02-220-199
(2)Damaged threads on the mounting pads:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the self-locking insert. Refer to TASK 72-30-01-300-801 (72-30-01, REPAIR 001).
* * * FOR ALL
Figure 812   Extension Case - Inspection
Subtask 72-00-02-220-060
CAUTION:
IF LEVER ARM DISTRESS OR INCORRECT ASSEMBLY RESULTS IN A VANE SCHEDULING ERROR, YOU MUST DO A SPECIAL INSPECTION OF THE HPC ROTOR BLADES.
AH.Do an inspection of all areas of each of the variable stator vane (VSV) stages 1-4 lever arms (lever arms) (071D1, 071D2, 071D3, 071D4, 071D6, 071D7, 071D8, 071D9) as follows. Refer to Figure 801.
(1)Cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the lever arm.
Subtask 72-00-02-220-061
(2)Distortion:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the lever arm.
Subtask 72-00-02-220-062
(3)Nicks, dents, and scratches in area H:
Maximum serviceable limit:
Not serviceable.
Maximum repairable limit:
0.001 inch (0.03 mm) in depth, if can fully remove the damage with a blend procedure. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Repair method:
Blend to remove the damage. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Subtask 72-00-02-220-063
(4)Nicks, dents, and scratches in area G for lever arms (071D1, 071D2, 071D3, 071D6, 071D7, 071D8):
Maximum serviceable limit:
Any amount, 0.006 inch (0.15 mm) in depth, after the removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Maximum repairable limit:
Any amount, if you can fully remove the damage with a blend that is not more than 0.010 inch (0.25 mm) in depth.
Repair method:
Blend to remove the damage. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Subtask 72-00-02-220-161
(5)Nicks, dents, and scratches in area G for lever arms (071D4, 071D9):
Maximum serviceable limit:
Any amount, 0.003 inch (0.15 mm) in depth, after the removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Maximum repairable limit:
Any amount, if you can fully remove the damage with a blend that is not more than 0.005 inch (0.13 mm) in depth.
Repair method:
Blend to remove the damage. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Subtask 72-00-02-220-064
AI.Do an inspection of the pin of each lever arm (071D0, 071D1, 071D2, 071D3, 071D4, 071D6, 071D7, 071D8, 071D9) as follows. Refer to Figure 801.
(1)Distortion:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the lever arm.
Subtask 72-00-02-220-065
(2)Looseness of the formed heads:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the lever arm.
Subtask 72-00-02-220-067
CAUTION:
IF LEVER ARM DISTRESS OR INCORRECT ASSEMBLY RESULTS IN A VANE SCHEDULING ERROR, YOU MUST DO A SPECIAL INSPECTION OF THE HPC ROTOR BLADES.
AJ.Do an inspection of all areas of each of the upper and lower VSV stages 1-4 actuating rings (actuating rings) (071A1, 071A2, 071A3, 071A4, 071A6, 071A9) as follows. Refer to Figure 813.
(1)Cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the actuating ring.
* * * FOR ALL
Figure 813   (Sheet 1 ) HPC Stator Stages 1 thru 4 Actuating Rings - Inspection
* * * FOR ALL
Figure 813   (Sheet 2 ) HPC Stator Stages 1 thru 4 Actuating Rings - Inspection
Subtask 72-00-02-220-068
(2)Distortion (twisting or bending):
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the actuating ring.
Subtask 72-00-02-220-069
(3)Scratches:
Maximum serviceable limit:
• Four in each segment, 0.015 inch (0.38 mm) in depth.
• Any amount, 0.005 inch (0.13 mm) in depth.
Maximum repairable limit:
Any amount, if you can fully remove the scratches with a blend that is not more than 0.020 inch (0.51 mm) in depth.
Repair method:
Blend to remove scratches. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Subtask 72-00-02-220-070
(4)Nicks and dents:
Maximum serviceable limit:
Any amount, 0.015 inch (0.38 mm) in depth.
Maximum repairable limit:
Any amount, if you can fully remove the nick or dent with a blend that is not more than 0.020 inch (0.51 mm) in depth.
Repair method:
Blend to remove nicks and dents. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Subtask 72-00-02-220-181
(5)Spacer button wear (Stage 1) (071A1, 071A6):
Maximum serviceable limit:
Any amount not more than 0.010 inch (0.025 mm) in depth.
Maximum repairable limit
Any amount if the actuation ring spacer assembly is within the dimensional limits. Refer to Subtask 72-00-02-220-168 (paragraph 5) .
Repair method:
Replace the actuation ring assembly.
Subtask 72-00-02-220-182
(6)Spacer button wear (Stage 2) (071A2):
Maximum serviceable limit:
Any amount not more than 0.010 inch (0.025 mm) in depth.
Maximum repairable limit
Any amount if the actuation ring spacer assembly is within the dimensional limits. Refer to Subtask 72-00-02-220-170 (paragraph 5) .
Repair method:
Replace the actuation ring assembly.
Subtask 72-00-02-220-183
(7)Spacer button wear (Stage 3) (071A3):
Maximum serviceable limit:
Any amount not more than 0.010 inch (0.025 mm) in depth.
Maximum repairable limit
Any amount if the actuation ring spacer assembly is within the dimensional limits. Refer to Subtask 72-00-02-220-172 (paragraph 5) .
Repair method:
Replace the actuation ring assembly.
Subtask 72-00-02-220-184
(8)Spacer button wear (Stage 4) (071A4, 071A9):
Maximum serviceable limit:
Any amount not more than 0.010 inch (0.025 mm) in depth.
Maximum repairable limit
Any amount if the actuation ring spacer assembly is within the dimensional limits. Refer to Subtask 72-00-02-220-174 (paragraph 5) .
Repair method:
Replace the actuation ring assembly.
Subtask 72-00-02-220-071
AK.Do an inspection of each lever pin bushing (bushing) (071TB) of the actuating rings as follows. Refer to Figure 801.
(1)Broken or worn bushing:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the bushing.
Subtask 72-00-02-220-072
AL.Do an inspection of each of the VSV stages 1-4 bridges (bridges) (071D1, 071D2, 071D3, 071D4, 071D6, 071D9) on the actuating rings as follows. Refer to Figure 801.
(1)Cracks and breaks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the bridge.
Subtask 72-00-02-220-073
CAUTION:
IF LEVER ARM DISTRESS OR INCORRECT ASSEMBLY RESULTS IN A VANE SCHEDULING ERROR, YOU MUST DO A SPECIAL INSPECTION OF THE HPC ROTOR BLADES.
AM.Do an inspection of each torque shaft (2322M67) as follows. Refer to Figure 801.
(1)Cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the torque shaft.
Subtask 72-00-02-220-074
(2)Nicks, dents, and scratches:
Maximum serviceable limit:
Any amount, 0.006 inch (0.15 mm) in depth, after the removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Maximum repairable limit:
Any amount, if you can fully remove the damage with a blend that is not more than 0.015 inch (0.38 mm) in depth.
Repair method:
Blend to remove the damage. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Subtask 72-00-02-220-075
CAUTION:
IF LEVER ARM DISTRESS OR INCORRECT ASSEMBLY RESULTS IN A VANE SCHEDULING ERROR, YOU MUST DO A SPECIAL INSPECTION OF THE HPC ROTOR BLADES.
AN.Do an inspection of each of the VSV stages 1-4 turnbuckles (turnbuckles) as follows. Refer to Figure 801.
(1)Cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the turnbuckle.
Subtask 72-00-02-220-076
(2)Nicks, dents, scores, scratches, and pits:
Maximum serviceable limit:
Any amount, 0.006 inch (0.15 mm) in depth, after the removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Maximum repairable limit:
Any amount, if you can fully remove the damage with a blend that is not more than 0.008 inch (0.20 mm) in depth.
Repair method:
Blend to remove the damage. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Subtask 72-00-02-220-077
CAUTION:
IF LEVER ARM DISTRESS OR INCORRECT ASSEMBLY RESULTS IN A VANE SCHEDULING ERROR, YOU MUST DO A SPECIAL INSPECTION OF THE HPC ROTOR BLADES.
AO.Do an inspection of each spherical bearing of the turnbuckles as follows. Refer to Figure 801.
(1)Looseness of the ball race:
Maximum serviceable limit:
Any amount, if there is not more than 0.006 inch (0.15 mm) of radial movement.
Repair method:
Replace the spherical bearing.
Subtask 72-00-02-220-078
CAUTION:
IF LEVER ARM DISTRESS OR INCORRECT ASSEMBLY RESULTS IN A VANE SCHEDULING ERROR, YOU MUST DO A SPECIAL INSPECTION OF THE HPC ROTOR BLADES.
AP.Do an inspection of each VSV forward support (support) (2322M73) and VSV aft support (support) (2322M74) as follows. Refer to Figure 801.
(1)Cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the support.
Subtask 72-00-02-220-079
(2)Nicks, dents, scores, scratches, and pits:
Maximum serviceable limit:
Any amount, 0.006 inch (0.15 mm) in depth, after the removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Maximum repairable limit:
Any amount, if you can fully remove the damage with a blend that is not more than 0.015 inch (0.38 mm) in depth.
Repair method:
Blend to remove the damage. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Subtask 72-00-02-220-080
AQ.Do an inspection of the outer surface of the combustion case (12001) of the CDN assembly (0010A) as follows. Refer to Figure 801 and Figure 814.
(1)Cracks in the parent material:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the CDN assembly.
* * * FOR ALL
Figure 814   Combustion Case - Inspection
Subtask 72-00-02-220-081
(2)Dents with a smooth contour:
Maximum serviceable limit:
0.020 inch (0.51 mm) in depth.
Repair method:
Replace the CDN assembly.
Subtask 72-00-02-220-082
(3)Nicks, scores, and scratches:
Maximum serviceable limit:
Not serviceable.
Maximum repairable limit:
Any amount, 0.010 inch (0.25 mm) in depth.
Repair method:
Blend with a 0.250 inch (6.35 mm) minimum blend radii. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Subtask 72-00-02-220-083
(4)Discoloration:
Maximum serviceable limit:
Any amount, if the metal is not crazed.
Repair method:
Replace the CDN assembly.
Subtask 72-00-02-220-084
(5)Bulges:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the CDN assembly.
Subtask 72-00-02-220-085
(6)Corrosion:
Maximum serviceable limit:
1.0 inch (25 mm) in diameter, 0.005 inch (0.13 mm) in depth.
Repair method:
Replace the CDN assembly.
Subtask 72-00-02-220-086
AR.Do an inspection of the pads on the combustion case (12001) as follows. Refer to Figure 814.
(1)Damaged threads on the pads (where LRUs are removed):
Maximum serviceable limit:
Not serviceable.
Maximum repairable limit:
Any amount, if all the damage added together is not more than one full thread.
Repair method:
Chase the threads.
Subtask 72-00-02-220-087
(2)Damaged threads in the inserts on the pads (where LRUs are removed):
Maximum serviceable limit:
Not serviceable.
Maximum repairable limit:
Not repairable.
Repair method:
Replace the insert. Refer to TASK 70-48-11-350-014 (INSTALLATION OF KEY-LOCKED INSERTS) .
Subtask 72-00-02-220-089
AS.Do an inspection of all body surfaces of the HPT stator case (174B0) of the HPT stage 2 nozzle assembly (17400) as follows. Refer to Figure 801 and Figure 815.
(1)Cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the HPT stage 2 nozzle assembly.
* * * FOR ALL
Figure 815   HPT Stator Case - Inspection
Subtask 72-00-02-220-090
(2)Nicks and scratches:
Maximum serviceable limit:
Any amount not more than 0.025 inch (0.64 mm) in depth.
Maximum repairable limit:
Any amount.
Repair method:
Blend. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Subtask 72-00-02-220-091
(3)Nicks and scratches, more than 0.025 inch (0.64 mm) in depth:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the HPT stage 2 nozzle assembly.
Subtask 72-00-02-220-092
(4)Dents:
Maximum serviceable limit:
Any amount, 0.125 inch (3.18 mm) in depth.
Repair method:
Replace the HPT stage 2 nozzle assembly.
Subtask 72-00-02-220-093
AT.Do an inspection of the TCF case assembly (2304M98) of the TCF assembly (92500) as follows. Refer to Figure 801 and Figure 816.
(1)Cracks in the outer case:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the TCF assembly.
* * * FOR ALL
Figure 816   TCF Case Assembly - Inspection
Subtask 72-00-02-220-095
(2)Radial cracks in the aft flange boltholes:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the TCF assembly.
Subtask 72-00-02-220-096
(3)Nicks and gouges:
Maximum serviceable limit:
Not serviceable.
Maximum repairable limit:
Any amount, not more than 0.010 inch (0.25 mm) in depth. Blend to a minimum radius of 0.250 inch (6.35 mm). Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Repair method:
Blend. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Subtask 72-00-02-220-097
(4)Dents:
Maximum serviceable limit:
Any amount 0.010 inch (0.25 mm) in depth.
Repair method:
Replace the TCF assembly.
Subtask 72-00-02-220-191
AU.Remove the core module assembly to get access to the forward end of the HPC forward case (073A0). Refer to TASK 72-31-00-800-803 (72-31-00, SPECIAL PROCEDURE 002). Blisk removal is not required. Inspect the stage 1 rotor blade rub land for:
(1)Nicks, dents, scratches, gouges, and grooves:
Maximum serviceable limit:
•
Any amount, not into parent metal.
•
Maximum area of individual defect, 0.250 sq in. (161.29 sq mm).
•
Maximum total area of defects, 1.0 sq in. (645 sq mm).
•
Blend to smooth contour. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).
Repair method:
Replace the case assembly.
Subtask 72-00-02-220-192
(2)Dimension A at 24 equally distance locations. Refer to Figure 817.
Maximum serviceable limit:
Dimension A cannot be more than 0.011 inch (0.28 mm) at none location.
Repair method:
Replace the case assembly.
* * * FOR ALL
Figure 817   HPC Stage 1 Abradable Dimension A
* * * FOR ALL
Figure 818   Flowpath Spacer - Inspection Areas
5 . Dimensional Inspection
Subtask 72-00-02-220-162
A.Do an dimensional inspection of the IGV actuating ring (071A0, 071A5) spacer assembly as follows. Refer to Figure 810.
(1)Dimension B (button):
Minimum serviceable limit:
Any amount not more than 0.010 inch (0.25 mm).
Repair method:
Replace the IGV actuation ring spacer assembly.
Subtask 72-00-02-220-176
(2)Dimension C:
Maximum serviceable limit:
1.087 inch (27.61 mm).
Maximum repairable limit:
1.097 inch (27.86 mm).
Repair method:
Adjust actuation ring spacer assembly to within serviceable limits. Torque spacer assembly nut to 60-70 lb in. (6.8-7.9 Nm).
Subtask 72-00-02-220-168
B.Do an dimensional inspection of the HPC stator stage 1 VSV actuating ring (071A1, 071A6) spacer assembly as follows. Refer to Figure 813.
(1)Dimension E (button):
Minimum serviceable limit:
Any amount not more than 0.010 inch (0.25 mm).
Repair method:
Replace the actuation ring.
Subtask 72-00-02-220-177
(2)Dimension F:
Maximum serviceable limit:
0.433 inch (11.00 mm).
Maximum repairable limit
0.443 inch (11.25 mm).
Repair method:
Adjust actuation ring spacer assembly to within serviceable limits. Torque spacer assembly nut to 60-70 lb in. (6.8-7.9 Nm).
Subtask 72-00-02-220-170
C.Do an dimensional inspection of the HPC stator stage 2 VSV actuating rings (071A2) as follows. Refer to Figure 813.
(1)Dimension G (button):
Minimum serviceable limit:
Any amount not more than 0.010 inch (0.25 mm).
Repair method:
Replace the actuation ring.
Subtask 72-00-02-220-178
(2)Dimension H:
Maximum serviceable limit:
0.516 inch (13.11 mm).
Maximum repairable limit
0.526 inch (13.36 mm).
Repair method:
Adjust actuation ring spacer assembly to within serviceable limits. Torque spacer assembly nut to 60-70 lb in. (6.8-7.9 Nm).
Subtask 72-00-02-220-172
D.Do an dimensional inspection of the HPC stator stage 3 VSV actuating rings (071A3) as follows. Refer to Figure 813.
(1)Dimension J (button):
Minimum serviceable limit:
Any amount not more than 0.010 inch (0.25 mm).
Repair method:
Replace the actuation ring.
Subtask 72-00-02-220-179
(2)Dimension K:
Maximum serviceable limit:
0.424 inch (10.77 mm).
Maximum repairable limit
0.434 inch (11.02 mm).
Repair method:
Adjust actuation ring spacer assembly to within serviceable limits. Torque spacer assembly nut to 60-70 lb in. (6.8-7.9 Nm).
Subtask 72-00-02-220-174
E.Do an dimensional inspection of the HPC stage 4 VSV actuating rings (071A4, 071A9) as follows. Refer to Figure 813.
(1)Dimension M (button):
Minimum serviceable limit:
Any amount not more than 0.010 inch (0.25 mm).
Repair method:
Replace the actuation ring.
Subtask 72-00-02-220-180
(2)Dimension N:
Maximum serviceable limit:
0.288 inch (7.32 mm).
Maximum repairable limit
0.298 inch (7.57 mm).
Repair method:
Adjust actuation ring spacer assembly to within serviceable limits. Torque spacer assembly nut to 60-70 lb in. (6.8-7.9 Nm).