* * * FOR ALL
TASK 72-00-21-200-801
1 . General.
A.This procedure gives instructions to do an inspection of the fan stator case assembly (fan stator assembly) (00109).
B.Any sub-assembly or part removed for access or limited workscope must be inspected in accordance with criteria within 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 NO. 1 - SOLVENT DEGREASING) or TASK 70-21-03-160-001 (CLEANING METHOD NO. 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 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.
D.If you will completely disassemble the fan stator assembly, this inspection 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.The forward fan case and the stator/aft fan case assembly are subassemblies of the fan stator assembly, which is a subassembly of the fan stator module. The aft fan case is a subassembly of the stator/aft fan case assembly.
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.
 
Description
Manufacturer
 
Non-Metallic Spatula or Equivalent
--
(3)Locally Manufactured Tools. None.
B.Consumable Materials.
 
Code No.
Description
 
C01-136
Deleted
 
C01-159
Primer, RTV (RTV primer)
 
C01-176
RTV, Silicone Elastomer (RTV 133, Black) (RTV 133)
 
C01-217
Primer (primer)
 
C01-218
Adhesive System, Two part, Grey Silicone (adhesive system)
 
C03-006
Deleted
 
C03-007
Primer, Epoxy (A50TF82) (primer)
 
C03-077
Primer, Epoxy, Water-Reducible, (BMS-10-11Y Type I, Class A, Grade E) (primer)
 
C03-079
Primer, Epoxy (primer)
 
C03-085
Primer, Epoxy, Yellow Zinc Phosphate (primer)
 
C03-100
Primer, Paint, Zinc-Molybdate, Alkyd Type (primer)
 
C03-109
Paint, Polyurethane, Semi-gloss, Gray 26270 (paint)
 
C03-119
Paint, Polyurethane, Gloss, Gray (polyurethane coating)
 
C04-003
Solvent, General (acetone)
 
C04-035
Solvent, General (isopropyl alcohol)
 
C10-012
Tape, Masking, High Temperature (tape)
C.Referenced Procedures.
 
ATA No.
Description
 
05-21-00
Life Limits 001
 
70-21-01
Cleaning Method No. 1 - Solvent Degreasing
 
70-21-03
Cleaning Method No. 3 - Steam Cleaning
 
70-32-03
Spot-Fluorescent-Penetrant Inspection
 
70-42-00
Blending and Removal of High Metal Procedures
 
70-43-07
Chemical Touch-Up Surface Refinishing Process for Aluminum
 
70-43-22
Paint - Epoxy Coating for Aluminum and Ferrous Alloys
 
72-00-00
Inspection 001
 
72-00-01
Repair 003
 
72-00-01
Repair 007
 
72-00-01
Repair 008
 
72-21-01
Repair 003
 
72-21-01
Repair 004
 
72-21-20
Repair 001
D.Expendable Parts. None.
3 . Specific Inspection Procedure.
Subtask 72-00-21-230-002
A.Do a spot-fluorescent-penetrant inspection to find all cracks on the forward fan containment case assembly (forward fan case) (01-011 , 72-21-00) or (01-012 , 72-21-00) and aft fan case (01-020 , 72-21-00). Refer to TASK 70-32-03-230-002 (SPOT-FLUORESCENT-PENETRANT INSPECTION).
Subtask 72-00-21-280-001
B.Do an inspection of the abradable shroud for looseness with a 0.375 inch (9.53 mm) diameter, 2.0 inches (51 mm) in length, round end rod as follows:
(1)Tap on the shroud while you listen for a clicking sound. Refer to Subtask 72-00-21-220-004, (paragraph 4.A.).
4 . Visual Inspection.
Subtask 72-00-21-220-001
A.Do an inspection of the forward fan case (01-011 , 72-21-00) or (01-012 , 72-21-00). Refer to Figure 801.
* * * FOR ALL
Figure 801   (Sheet 1 ) Fan Stator Assembly - Inspection
* * * FOR ALL
* * * PRE SB   72-0039( Forward Fan Case with Two Stiffening Hats )
Figure 801   (Sheet 2 ) Fan Stator Assembly - Inspection
* * * FOR ALL
* * * SB   72-0039( Forward Fan Case with One Stiffening Hat )
Figure 801   (Sheet 3 ) Fan Stator Assembly - Inspection
* * * FOR ALL
Figure 801   (Sheet 4 ) Fan Stator Assembly - Inspection
Subtask 72-00-21-220-002
(1)Axial crack adjacent to the abradable panel joints:
Maximum serviceable limit:
Any length adjacent to each abradable panel joint and located between the forward and aft polysulfide ply.
Repair method:
Not applicable.
Subtask 72-00-21-220-003
(2)Diagonal abradable panel joint cracks:
NOTE:
This appears as a diagonal crack starting at the axial panel joint (sometimes axial crack) and moving toward the polysulfide ply or facesheet joint at the aft side of the abradable panel.
Maximum serviceable limit:
Any amount adjacent to or between each abradable panel joint and the aft polysulfide ply.
Repair method:
Not applicable.
Subtask 72-00-21-220-004
(3)Voids, wear grooves, rubs, and areas not bonded to the facesheet:
Maximum serviceable limit:
Any amount, 0.08 inch (2.0 mm) in depth, if:
•
The largest area of damage is not more than 6.0 sq in. (39 sq cm)
•
The total damage is not more than 40.0 sq in. (258 sq cm)
•
There is a minimum distance of the maximum dimension of adjacent voids between the damaged areas.
Repair method:
Repair. Refer to TASK 72-00-01-300-803 (72-00-01, REPAIR 002) or TASK 72-00-01-300-801 (72-00-01, REPAIR 003).
Subtask 72-00-21-220-005
(4)Cracks in the eight trench filler panel joints and eight abradable panel joints:
Maximum serviceable limit:
Any amount.
Repair method:
Not applicable.
Subtask 72-00-21-220-061
(5)Axial crack adjacent to the abradable panel joints:
Maximum serviceable limit:
Any length adjacent to each abradable panel joint and located between the forward and aft polysulfide ply.
Repair method:
Not applicable.
Subtask 72-00-21-220-006
(6)Spalled, loose, or missing abradable material in the transition zones:
Maximum serviceable limit:
Any amount.
Repair method:
Repair. Refer to TASK 72-00-01-300-803 (72-00-01, REPAIR 002) or TASK 72-00-01-300-801 (72-00-01, REPAIR 003).
Subtask 72-00-21-220-060
(7)Surface defects and punctures in the trench filler facesheet of area A. Refer to Figure 802, Figure 813, and Figure 814.
Maximum serviceable limit:
0.03 inch (0.7 mm) in depth and 0.5 inch (12.7 mm) in diameter, if there is no delamination or disbonds or visible exposed fibers.
Repair method:
Repair. Refer to TASK 72-00-01-300-806 (72-00-01, REPAIR 008) or TASK 72-21-01-300-804 (72-21-01, REPAIR 006).
Subtask 72-00-21-220-086
(8)Surface defects and punctures in the trench filler facesheet outside of area A. Refer to Figure 802, Figure 813, and Figure 814.
Maximum serviceable limit:
0.03 inch (0.7 mm) in depth and 0.5 inch (12.7 mm) in diameter, if there is no delamination or disbonds or visible exposed fibers.
Repair method:
Repair. Refer to TASK 72-00-01-300-801 (72-00-01, REPAIR 003) or TASK 72-21-01-300-804 (72-21-01, REPAIR 006).
Subtask 72-00-21-220-087
(9)Damaged, cracked, torn, punctured or disbonded polysulfide coating in the trench filler spaces:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-00-01-300-805 (72-00-01, REPAIR 007) .
* * * FOR ALL
Figure 802   (Sheet 1 ) Fan Stator Module Assembly - Facesheet Repair Area
* * * FOR ALL
Figure 802   (Sheet 1 ) Fan Stator Module Assembly - Facesheet Repair Area
Subtask 72-00-21-220-008
B.Do an inspection of the forward ”A” and aft “B” mounting flanges of the forward fan case (83500) as follows. Refer to Figure 801.
(1)Missing glass plies or tear outs:
Maximum serviceable limit:
0.020 inch (0.50 mm) in depth and 0.5 inch (12.7 mm) in diameter, if carbon plies are not exposed.
NOTE:
Glass plies will be in yellowish shade white carbon plies will be in black shade.
Repair method:
Repair the fan case. Refer to TASK 72-21-01-300-802 (72-21-01, REPAIR 003) .
Subtask 72-00-21-220-009
(2)Cracks on the outer diameter surface:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the fan stator assembly.
Subtask 72-00-21-220-029
(3)Delamination in the flanges:
Maximum serviceable limit:
0.016 inch (0.406 mm) in depth, at flanges "A" and "B".
Repair method:
Repair the fan case. Refer to TASK 72-21-01-300-802 (72-21-01, REPAIR 003) .
Subtask 72-00-21-220-030
(4)Nicks, dents, scratches, rubs, and scuffs on flanges (except the OD surface of flanges):
Maximum serviceable limit:
0.016 inch (0.406 mm) in depth, at flanges "A" and "B". Open indications with visible fiber damage are not serviceable.
Repair method:
Repair the forward fan case. Refer to TASK 72-21-01-300-802 (72-21-01, REPAIR 003).
Subtask 72-00-21-220-088
(5)Nicks, dents, scratches, rubs, scuffs, and fretting on the OD surfaces in area C (tear out zone). Refer to Figure 803:
Maximum serviceable limit:
Not serviceable.
Repair method:
Contact GE Engineering.
Subtask 72-00-21-220-089
(6)Nicks, dents, scratches, rubs, scuffs, and fretting on the OD surface of flanges in area D (outside of tear out zone). Refer to Figure 803:
Maximum serviceable limit:
0.05 inch (1.27 mm) in depth at flanges “A” and “B”. Open indications with visible fiber damage are not serviceable.
Repair method:
Repair the fan case. Refer to TASK 72-21-01-300-802 (72-21-01, REPAIR 003) .
Subtask 72-00-21-220-062
(7)Pitting:
NOTE:
Surface condition in which pin holes or pits are evident in the surface resin only, but no fibers are visible or exposed.
Maximum serviceable limit:
Any amount, up to 0.01 inch (0.3 mm) in diameter and 0.01 inch (0.3 mm) in depth and the fibers are not exposed and broken.
Repair method:
Repair the fan case. Refer to TASK 72-21-01-300-802 (72-21-01, REPAIR 003) .
Subtask 72-00-21-220-073
(8)Bolthole edge ply damage "sun spot":
Maximum serviceable limit:
Any amount 0.100 inch (2.54 mm) in depth, 1.0 inch (25.4 mm) in diameter, if there are no missing glass plies, no delamination or cracks in the boltholes inner surface.
Repair method:
Repair the fan case. Refer to TASK 72-21-01-300-802 (72-21-01, REPAIR 003).
NOTE:
Bolthole edge ply damage can result in discoloration in the resin material of the laminates.
Subtask 72-00-21-220-090
(9)Flaying at the bolthole edges. Refer to Figure 808:
Maximum serviceable limit:
Any amount, if there are no missing glass plies, no delamination or crack like defects found in the bolthole inner surface.
Repair method:
Repair the fan case. Refer to TASK 72-21-01-300-802 (72-21-01, REPAIR 003).
Subtask 72-00-21-220-091
(10)Missing epoxy resin on the flange faces, edge and casing shell. Refer to Figure 804:
NOTE:
Glass plies beneath the epoxy resin will be exposed when the epoxy resin is missing.
Maximum serviceable limit:
Any amount, if carbon fibers are not exposed.
Repair method:
Repair the fan case. Refer to TASK 72-21-01-300-802 (72-21-01, REPAIR 003).
Subtask 72-00-21-220-092
(11)Crazing on resin rich areas at corner of flange with inner diameter. Refer to Figure 805:
NOTE:
Crazing is minute cracks in the surface resin. Crazing can have no broken fibers.
Maximum serviceable limit:
Any amount.
Repair method:
Not applicable.
* * * FOR ALL
Figure 803   (Sheet 1 ) Forward Containment Case “A” Flange - Tear-Out Zone Definition
* * * FOR ALL
Figure 803   (Sheet 2 ) Forward Containment Case “B” Flange - Tear-Out Zone Definition
* * * FOR ALL
Figure 804   Missing Epoxy Resin on Flange Faces, Flange Edge and Casing Shell
* * * FOR ALL
Figure 805   Crazing on Resin Rich Areas at Corner of Flanges with Inner Diameter
* * * FOR ALL
Figure 806   Missing Adhesive at the Joint of Forward Face of Forward Acoustic Treatment with “A” Flange of Fan Containment Case
Subtask 72-00-21-220-010
C.Do an inspection of all areas of the outer liner mid acoustics (mid acoustic liners) (01-500 , 72-21-00) on the forward fan case (83500) as follows. Refer to Figure 801.
(1)Cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the mid acoustic liners.
Subtask 72-00-21-220-011
(2)Nicks and scratches on the facesheet:
Maximum serviceable limit:
Any amount, if the facesheet is not cracked.
Repair method:
Replace the mid acoustic liners.
Subtask 72-00-21-220-012
(3)Tears and cuts in the facesheet:
Maximum serviceable limit:
Any amount, if the facesheet is not cracked.
Repair method:
Replace the mid acoustic liners.
Subtask 72-00-21-220-013
(4)Delamination:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the mid acoustic liners.
Subtask 72-00-21-220-014
(5)Loose screws:
Maximum serviceable limit:
Not serviceable.
Maximum repairable limit:
Any amount.
Repair method:
Tighten the screw.
Subtask 72-00-21-220-031
(6)Missing screws:
Maximum serviceable limit:
Not serviceable.
Maximum repairable limit:
Any amount.
Repair method:
Replace the screw.
Subtask 72-00-21-220-015
(7)Holes, cuts, or tears in the C01-176  RTV 133 in the circumferential gap between the mid acoustic liners and the outlet guide vane (OGV) fairing. Refer to Figure 807.
Maximum serviceable limit:
Not serviceable.
Maximum repairable limit:
Any amount.
Repair method:
Replace the C01-176  RTV 133.
* * * FOR ALL
* * * PRE SB   72-0039( Forward Fan Case With Two Stiffening Hats )
Figure 807   Circumferential Gap Between the Mid Acoustic Liners and the OGV Fairing Assemblies
* * * FOR ALL
* * * SB   72-0039( Forward Fan Case With One Stiffening Hat )
Figure 807A   Circumferential Gap Between the Mid Acoustic Liners and the OGV Fairing Assemblies
Subtask 72-00-21-220-016
D.Do an inspection of the captive nut assemblies on the forward fan case (83500) as follows. Refer to Figure 801.
(1)Loose or missing rivets:
Maximum serviceable limit:
Not serviceable.
Maximum repairable limit:
Any amount.
Repair method:
Replace the rivets. Use wet installation. Refer to TASK 70-13-00-390-001 (70-13-00 RIVETED JOINTS) .
Subtask 72-00-21-220-032
(2)Damaged captive nut cage:
Maximum serviceable limit:
Not serviceable.
Maximum repairable limit:
Any amount.
Repair method:
Replace the captive nut assembly. Use wet installation to replace rivets. Refer to TASK 70-13-00-390-001 (RIVETED JOINTS) .
Subtask 72-00-21-220-033
E.Do an inspection of the casing shell outer diameter on the forward fan case (83500) as follows. Refer to Figure 801.
(1)Nicks, dents, scratches, rubs, and scuffs:
Maximum serviceable limit:
Any amount, up to 0.125 inch (3.18 mm) in width and 0.016 inch (0.41 mm) in depth and no delamination.
NOTE:
Use a steel rod 0.375 inch (9.53 mm) in diameter and 2.0 inches (51 mm) in length, with a round end to tap on the case in the damaged area while listening for clicking sounds. Start tapping in an undamaged region and work toward the damaged area while listening for clicking sounds. If a solid sound is heard, the area does not have a delamination. If a hollow sound is heard, the area has a delamination. If delamination is found replace the forward fan case.
Repair method:
Repair the outer diameter. Refer to TASK 72-21-01-300-802 (72-21-01, REPAIR 003).
Subtask 72-00-21-220-034
(2)Damage to the carbon fibers (below the protective plies) 0.015 inch (0.38 mm) in depth:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the fan stator assembly.
Subtask 72-00-21-220-063
(3)Tool marks. Refer to Figure 808.
NOTE:
A local surface condition of severe but gradual contour change affecting both the fabric and the resin matrix.
Maximum serviceable limit:
•
Tool mark-off allowed in areas TA (shiny tool marks).
•
Tool mark-off (o-ring band) permitted on casing shell outer diameter. Bladder mark-off area to be located 150-210 degrees from the top vertical center line.
Repair method:
Not applicable.
Subtask 72-00-21-220-064
(4)In-plane wrinkles in the flanges and the casing shell:
NOTE:
Fabric gathered in creases, furrows, ridges or folds in which the distortion is within the surface or plane of the part contour.
Maximum serviceable limit:
Any amount.
Repair method:
Not applicable.
Subtask 72-00-21-220-065
(5)Resin ridges in the casing shell:
NOTE:
A raised surface condition consisting in resin formed in areas that do not contain fiber.
Maximum serviceable limit:
Any amount.
Repair method:
Not applicable.
Subtask 72-00-21-220-066
(6)Surface crazing:
NOTE:
Minute cracks in the surface resin. Crazing can have no broken fibers.
Maximum serviceable limit:
Any amount.
Repair method:
Not applicable.
Subtask 72-00-21-220-067
(7)Surface cracks:
NOTE:
Cracks can be identified by exposed fibers where the crack has resulted in a separation of protective plies.
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the fan stator assembly.
Subtask 72-00-21-220-068
(8)Surface porosity:
NOTE:
Surface condition in which pin holes or pits are evident in the surface resin only, but no fibers are visible or exposed.
Maximum serviceable limit:
Any amount, if porosity does not extend below the first protective ply, 0.016 inch (0.41 mm) in depth with fibers not exposed and broken.
Repair method:
Replace the fan stator assembly.
Subtask 72-00-21-220-093
(9)Missing epoxy resin:
NOTE:
Glass plies beneath the epoxy resin will be exposed when the epoxy resin is missing.
Maximum serviceable limit:
Any amount, if carbon fibers are not exposed.
Repair method:
Repair the fan case. Refer to TASK 72-21-01-300-802 (72-21-01, REPAIR 003).
Subtask 72-00-21-220-035
F.Do an inspection of the stiffening hats on the forward fan case casing shell (83500) as follows. Refer to Figure 801.
(1)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 click sound is heard, the area does not have a delamination.
•
If a hollow or dull sound is heard, the area has a delamination.
Subtask 72-00-21-220-069
(2)Nicks, dents, scratches, rubs, and scuffs:
(a)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 click sound is heard, the area does not have a delamination.
•
If a hollow or dull sound is heard, the area has a delamination.
Maximum serviceable limit:
Any amount, up to 0.030 inch (0.76 mm) in depth and 3.00 inches (76.2 mm) in length. No delamination is permitted.
Repair method:
•
Repair, if no delamination is found. Refer to TASK 72-21-01-300-801 (72-21-01, REPAIR 004).
•
Replace the forward fan case, if a delamination is found.
Subtask 72-00-21-220-036
(3)Disbonds between stiffening hats to casing shell:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the fan stator assembly.
Subtask 72-00-21-220-094
(4)Missing epoxy resin:
NOTE:
Glass plies beneath the epoxy resin will be exposed when the epoxy resin is missing.
Maximum serviceable limit:
Any amount, if carbon fibers are not exposed.
Repair method:
Repair the fan case. Refer to TASK 72-21-01-300-801 (72-21-01, REPAIR 004).
Subtask 72-00-21-220-037
G.Do an inspection of the stiffening caps on the forward fan case (83500) casing shell as follows. Refer to Figure 801.
(1)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 click sound is heard, the area does not have a delamination.
•
If a hollow or dull sound is heard, the area has a delamination.
Subtask 72-00-21-220-070
(2)Nicks, dents, scratches, rubs, and scuffs:
(a)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 click sound is heard, the area does not have a delamination.
•
If a hollow or dull sound is heard, the area has a delamination.
Maximum serviceable limit:
Any amount, up to 0.030 inch (0.76 mm) in depth and 3.00 inches (76.2 mm) in length. No delamination is permitted.
Repair method:
•
Repair, if no delamination is found. Refer to TASK 72-21-01-300-801 (72-21-01, REPAIR 004).
•
Replace the forward fan case, if a delamination is found.
Subtask 72-00-21-220-095
(3)Missing epoxy resin:
NOTE:
Glass plies beneath the epoxy resin will be exposed when the epoxy resin is missing.
Maximum serviceable limit:
Any amount, if carbon fibers are not exposed.
Repair method:
Repair the fan case. Refer to TASK 72-21-01-300-801 (72-21-01, REPAIR 004).
* * * FOR ALL
* * * PRE SB   72-0039( Forward Fan Case with Two Stiffening Hats )
Figure 808   (Sheet 1 ) Forward Fan Case - Tool Marks
* * * FOR ALL
* * * SB   72-0039( Forward Fan Case with One Stiffening Hat )
Figure 808   (Sheet 2 ) Forward Fan Case - Tool Marks
* * * FOR ALL
Figure 808   (Sheet 3 ) Forward Fan Case - Tool Marks
* * * FOR ALL
Figure 808   (Sheet 4 ) Features on Outer Diameter of the Forward Containment Case
* * * FOR ALL
Figure 808   (Sheet 5 ) Indications at Forward and Aft Flange Boltholes
* * * FOR ALL
Figure 808   (Sheet 6 ) Indications at Forward and Aft Flange Boltholes
Subtask 72-00-21-220-038
(4)Disbonds between stiffening caps to stiffening hats:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the fan stator assembly.
Subtask 72-00-21-220-074
H.Do an inspection of the forward acoustic treatment for:
(1)Cracks:
Maximum serviceable limit:
Any amount, 6.0 inches (152 mm) in length and 0.060 inch (1.52 mm) in width, if:
•
No crack in the facesheet material is nearer than 10 inches (254 mm) to an adjacent area with a cracked facesheet material
•
Disbonds to the honeycomb core and delaminations within the facesheet are not permitted.
Repair method:
Repair. Refer to TASK 72-21-01-300-803 (72-21-01, REPAIR 001).
Subtask 72-00-21-220-075
(2) Nicks, dents, and scratches on the facesheet:
Maximum serviceable limit:
Any amount, if the facesheet is not cracked.
Repair method:
Repair. Refer to TASK 72-21-01-300-803 (72-21-01, REPAIR 001).
Subtask 72-00-21-220-076
(3)Tears and cuts on the facesheet:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-21-01-300-803 (72-21-01, REPAIR 001).
Subtask 72-00-21-220-077
(4)Delaminations on the facesheet:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-21-01-300-803 (72-21-01, REPAIR 001).
Subtask 72-00-21-220-078
(5)Punctures and holes on the facesheet:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-21-01-300-803 (72-21-01, REPAIR 001).
Subtask 72-00-21-220-096
(6)Missing closeout plies:
Maximum serviceable limit:
Any amount, along the circumference if the width of closeout plies in axial direction is 0.200 inch (5.08 mm) or more. Refer to Figure 815.
Repair method:
Repair. Refer to TASK 72-21-01-300-805 (72-21-01, REPAIR 007) .
Subtask 72-00-21-220-097
(7)Missing adhesive at the joint of forward face with flange “A” and forward wall of the forward acoustic treatment. Refer to Figure 806.
Maximum serviceable limit:
Any amount, if there is no delamination or disbond.
Repair method:
Repair the fan case. Refer to TASK 72-21-01-300-802 (72-21-01, REPAIR 003) .
Subtask 72-00-21-220-099
(8)Delaminations on the closeout plies:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-21-01-300-805 (72-21-01, REPAIR 007) .
Subtask 72-00-21-220-100
(9)Cracks on the closeout plies:
Maximum serviceable limit:
Not serviceable.
Repair method:
Repair. Refer to TASK 72-21-01-300-805 (72-21-01, REPAIR 007) .
Subtask 72-00-21-220-017
I.Do an inspection of the aft fan case (84100) as follows. Refer to Figure 801.
(1)Cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the fan stator assembly.
Subtask 72-00-21-220-018
(2)Nicks and scratches (does not include the mounting flanges, the OGV boltholes, or the aft fan case ribs):
Maximum serviceable limit:
Any amount, 0.005 inch (0.13 mm) in depth, after removal of high metal, with no less than 1.0 inch (25 mm) between defects. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Maximum repairable limit:
Any amount, 0.040 inch (0.13 mm) in depth, after removal of high metal, with no less than 1.0 inch (25 mm) between defects. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Repair method:
Blend to a radius of 0.250 inch (6.35 mm). Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) . Apply coating to the repaired areas. Refer to TASK 70-43-07-380-007 (CHEMICAL TOUCH-UP SURFACE REFINISHING PROCESS FOR ALUMINUM) .
Subtask 72-00-21-220-039
(3)Nicks and scratches on the mounting flanges:
Maximum serviceable limit:
Any amount, 0.010 inch (0.38 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, 0.030 inch (0.76 mm) in depth, after removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Repair method:
Blend to a radius of 0.250 inch (6.35 mm). Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) . Apply coating to the repaired areas. Refer to TASK 70-43-07-380-007 (CHEMICAL TOUCH-UP SURFACE REFINISHING PROCESS FOR ALUMINUM) .
Subtask 72-00-21-220-040
(4)Nicks and scratches around the OGV boltholes:
Maximum serviceable limit:
Any amount, 0.005 inch (0.13 mm) in depth, after removal of high metal, with no less than 1.0 inch (25 mm) between defects. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Maximum repairable limit:
•
One per bolthole 0.050 inch (1.27 mm) in depth after removal of high metal on 0.406 inch (10.31 mm) diameter boltholes. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).
•
One per bolthole 0.010 inch (0.25 mm) in depth and 0.10 inch (2.5 mm) in length after removal of high metal on 0.502 inch (12.75 mm) diameter boltholes. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).
•
One per bolthole 0.050 inch (1.27 mm) in depth after removal of high metal on 0.656 inch (16.66 mm) diameter boltholes. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).
Repair method:
Blend to a radius of 0.250 inch (6.35 mm). Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) . Apply coating to the repaired areas. Refer to TASK 70-43-07-380-007 (CHEMICAL TOUCH-UP SURFACE REFINISHING PROCESS FOR ALUMINUM) .
Subtask 72-00-21-220-041
(5)Nicks and scratches on the aft fan case rib web:
Maximum serviceable limit:
Any amount, 0.020 inch (0.51 mm) in depth, after removal of high metal, with no less than 1.0 inch (25 mm) between defects. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Maximum repairable limit:
Any amount, 0.025 inch (0.64 mm) in depth, after removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Repair method:
Blend to a radius of 0.250 inch (6.35 mm). Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) . Apply coating to the repaired areas. Refer to TASK 70-43-07-380-007 (CHEMICAL TOUCH-UP SURFACE REFINISHING PROCESS FOR ALUMINUM) .
Subtask 72-00-21-220-042
(6)Wear (does not include the mounting flanges):
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, 0.010 inch (0.25 mm) in depth, after removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Repair method:
Blend to a radius of 0.250 inch (6.35 mm). Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) . Apply coating to the repaired areas. Refer to TASK 70-43-07-380-007 (CHEMICAL TOUCH-UP SURFACE REFINISHING PROCESS FOR ALUMINUM) .
Subtask 72-00-21-220-043
(7)Wear in the mounting flanges:
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, 0.020 inch (0.51 mm) in depth, after removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Repair method:
Blend to a radius of 0.250 inch (6.35 mm). Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) . Apply coating to the repaired areas. Refer to TASK 70-43-07-380-007 (CHEMICAL TOUCH-UP SURFACE REFINISHING PROCESS FOR ALUMINUM) .
Subtask 72-00-21-220-019
(8)Dents (does not include the fan case ribs):
Maximum serviceable limit:
Smooth contour dents, 0.125 inch (3.18 mm) in depth, with no less than 6.0 inches (152 mm) between defects.
Repair method:
Replace the fan stator assembly.
Subtask 72-00-21-220-044
(9)Dents on the fan case ribs:
Maximum serviceable limit:
Smooth contour dents, 0.125 inch (3.18 mm) in depth, with no less than 36.0 inches (914 mm) between defects.
Repair method:
Replace the fan stator assembly.
Subtask 72-00-21-220-020
(10)Rivets and locknuts that are loose or missing:
Maximum serviceable limit:
Not serviceable.
Maximum repairable limit:
Any amount.
Repair method:
Replace the rivet or locknut. Refer to TASK 70-13-00-390-001 (70-13-00 RIVETED JOINTS) .
Subtask 72-00-21-220-045
(11)Damaged anchor nut cages:
Maximum serviceable limit:
Not serviceable.
Maximum repairable limit:
Any amount.
Repair method:
Replace the anchor nut cage as follows:
NOTE:
Remove the mid outer liner bolt for inspection. Refer to TASK 72-00-01-040-805 (72-00-01, DISASSEMBLY 001). Do an inspection of the mid outer liner bolt for corrosion/pitting. Refer to TASK 72-21-99-200-801 (72-21-99, INSPECTION 001).
(a)Remove the anchor nuts. Refer to TASK 70-13-00-390-001 (RIVETED JOINTS).
(b)Do an inspection of the aft fan case shell for pitting. Refer to TASK 72-21-02-200-801 (72-21-02, INSPECTION 001) (Subtask 72-21-02-220-024 (paragraph 3.C.(11))).
(c)Apply coating in free state before the anchor installation. Refer to TASK 70-43-07-380-007 (CHEMICAL TOUCH-UP SURFACE REFINISHING PROCESS FOR ALUMINUM).
(d)Apply C03-077  primer (for example, primer P/N 10P4-2NF/EC-117S   ) to the aft fan case mating surface with the anchor nut.
(e)Perform a wet installation of the replacement anchor nuts P/N MS21076L4N   and rivets P/N 9025M79P06   as follows:
1Use C03-001  primer for the installation of the rivets.
2Rivet head must be within 0.0095-0.0105 inch (0.242-0.266 mm) below the surface of the aft fan case.
3Do an inspection of the formed rivets. Refer to TASK 70-13-01-390-002 (ACCEPTABILITY LIMITS FOR FORMED RIVETS).
(f)Install the mid outer liner bolt. Refer to TASK 72-00-01-430-803 (72-00-01, ASSEMBLY 001).
Subtask 72-00-21-220-021
(12)Missing paint or coating:
Maximum serviceable limit:
Not serviceable.
Maximum repairable limit:
Any amount.
Repair method:
Apply coating. Refer to TASK 70-43-07-380-007 (CHEMICAL TOUCH-UP SURFACE REFINISHING PROCESS FOR ALUMINUM) . Apply C03-077  primer or C03-079  primer in accordance with manufacturer's instructions.
Subtask 72-00-21-220-082
(13)Corrosion and pitting at and around the mounting flanges (forward and aft fan case) and case surfaces:
Maximum serviceable limit:
Not serviceable.
Maximum repairable limit:
Any amount, up to 0.030 inch (0.76 mm) in depth.
Repair method:
Repair the mounting flanges and case surfaces as follows:
(a)Clean the aft fan case corrosion residue. Refer to TASK 72-21-02-100-801 (72-21-02, CLEANING 001). The use of C10-010  scotch brite is recommended to assist with the removal. Make sure not to use C10-010  scotch brite on the composite forward fan case.
(b)Clean the composite forward fan case corrosion residue. Refer to TASK 72-21-01-100-801 (72-21-01, CLEANING 001).
(c)Blend to remove corrosion to a radius of 0.250 inch (6.35 mm). Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).
(d)Apply coating. Refer to TASK 70-43-07-380-007 (CHEMICAL TOUCH-UP SURFACE REFINISHING PROCESS FOR ALUMINUM).
(e)Apply C03-077  primer or 44-GN-60  primer in accordance with manufacturer's instructions.
Subtask 72-00-21-220-083
(14)Corrosion and pitting of the anchor nut cages and rivets:
Maximum serviceable limit:
Not serviceable.
Maximum repairable limit:
Any amount.
Repair method:
Replace the rivets and anchor nuts as follows:
NOTE:
Remove the mid outer liner bolt for inspection. Refer to TASK 72-00-01-040-805 (72-00-01, DISASSEMBLY 001). Do an inspection of the mid outer liner bolt for corrosion/pitting. Refer to TASK 72-21-99-200-801 (72-21-99, INSPECTION 001).
(a)Remove the anchor nuts. Refer to TASK 70-13-00-390-001 (RIVETED JOINTS).
(b)Do an inspection of the aft fan case shell for pitting. Refer to TASK 72-21-02-200-801 (72-21-02, INSPECTION 001) (Subtask 72-21-02-220-024 (paragraph 3.C.(11))).
(c)Blend to remove corrosion with pitting. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) and as follows:
1Maximum depth must not be more than 0.040 inch (1.02 mm).
2Blend to a minimum radius of 0.250 inch (6.35 mm).
3Blend minimum material thickness to completely remove pitting.
4Do an inspection if there is any evidence of corrosion or pitting in boltholes.
5Blend to make a smooth adjacent surface ensuring proper contact surface between aft fan case and anchor nut.
(d)The gap between the anchor nut and the blended surface of the aft fan case, before the anchor installation in free state, must be not more than 0.015 inch (0.38 mm).
(e)Apply coating in free state before the anchor installation. Refer to TASK 70-43-07-380-007 (CHEMICAL TOUCH-UP SURFACE REFINISHING PROCESS FOR ALUMINUM).
(f)Apply C03-077  primer (for example, primer P/N 10P4-2NF/EC- 117S   ) to the aft fan case mating surface with the anchor nut.
(g)Perform a wet installation of the replacement anchor nuts P/N MS21076L4N   and rivets P/N 9025M79P06   as follows:
1Use C03-001  primer for the installation of the rivets.
2Rivet head must be within 0.0095-0.0105 inch (0.242-0.266 mm) below the surface of the aft fan case.
3Do an inspection of the formed rivets. Refer to TASK 70-13-01-390-002 (ACCEPTABILITY LIMITS FOR FORMED RIVETS).
(h)Install the mid outer liner bolt. Refer to TASK 72-00-01-430-803 (72-00-01, ASSEMBLY 001).
Subtask 72-00-21-220-022
J.Do an inspection of each fan OGV fairing assembly (OGV fairing assembly) (84103, 84104, 84105, 84106, 84107, 84108, 84109, 8410A, 8410B, 8410C, 8410D, 8410E, 8410F, 8410G, 8410H, 8410J, 8410P, 8410R, 8410S) on the aft fan case (84100) as follows. Refer to Figure 809.
(1)Missing pieces:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the OGV fairing assembly.
* * * FOR ALL
Figure 809   OGV Fairing Assembly - Inspection
Subtask 72-00-21-220-023
(2)Shallow nicks, scratches, and wear on all sufaces:
Maximum serviceable limit:
Any amount.
Repair method:
Replace the OGV fairing assembly.
Subtask 72-00-21-220-024
(3)Cracks in all areas of the flowpath surface:
Maximum serviceable limit:
One crack, not more than 0.500 inch (12.70 mm) in length, if there are no other cracks on the edges of the flowpath surface.
Repair method:
Replace the OGV fairing assembly.
Subtask 72-00-21-220-084
(4)Missing RTV in screw holes above screw heads:
NOTE:
RTV is only applicable to the aft row of screw heads.
Maximum serviceable limit:
Any amount on the forward row of bolts.
Maximum repairable limit:
Any amount on the aft row of bolts.
Repair method:
Apply C01-176  RTV 133 to the aft row of bolts. Refer to TASK 72-21-00, (Assembly 002 Configuration-01) , Subtask 72-21-00-380-326 for pre-PIP2 engines and TASK 72-21-00, (Assembly 002 Configuration-02) , Subtask 72-21-00-440-927 for PIP-2 engines.
Subtask 72-00-21-220-025
K.Do an inspection of the fan outlet guide vanes (OGV) (8400A, 8400C, 8400D, 8400E, 8400F, 8400G, 8400H, 8400J, 8400K, 8400L, 8400M) as follows. Refer to Figure 810.
(1)Cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the fan stator assembly.
* * * FOR ALL
Figure 810   Fan OGV - Inspection Areas
Subtask 72-00-21-220-046
(2)Nicks and scratches (does not include inner and outer mounting flanges or flowpath surfaces of the inner platform):
Maximum serviceable limit:
•
Area A, 0.0250 inch (0.635 mm) in depth, 0.5 inch (13 mm) in length.
•
Area B, one each side 0.010 inch (0.25 mm) in depth, 0.5 inch (13 mm) in length.
Repair method:
Replace the fan stator assembly.
Subtask 72-00-21-220-047
(3)Nicks and scratches on the inner and outer mounting flanges:
Maximum serviceable limit:
Any amount 0.030 inch (0.76 mm) in depth, 0.150 inch (3.81 mm) in length, 0.050 inch (1.27 mm) in width.
Maximum repairable limit:
0.040 inch (1.02 mm) in depth.
Repair method:
Blend. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) . No more than 20 percent of any surface can be removed.
Subtask 72-00-21-220-048
(4)Nicks and scratches on the flowpath surface of the inner platform:
Maximum serviceable limit:
Any amount 0.030 inch (0.76 mm) in depth, 2.00 inches (50.8 mm) in length, 0.050 inch (1.27 mm) in width.
Maximum repairable limit:
0.040 inch (1.02 mm) in depth.
Repair method:
Blend. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Subtask 72-00-21-220-098
(5)Nut plates, rivets, lock nuts and machine screws (retaining bolts) that are damaged, loose or missing:
Maximum serviceable limit:
Not serviceable.
Maximum repairable limit:
Any amount.
Repair method:
Replace the rivet, locknut, bolt or nut plates. Refer to TASK 72-21-20-300-801 (72-21-20, REPAIR 001) .
Subtask 72-00-21-220-026
(6)Dents/distortion (does not include flowpath surfaces of the inner platform):
Maximum serviceable limit:
•
Area A, four smooth contoured dents each strut 0.090 inch (2.29 mm) in depth, if there is no connected distortion in area B.
•
Area B, four smooth contoured dents each strut 0.040 inch (1.02 mm) in depth. Dents that connect area A and area B must not be more than 0.040 inch (1.02 mm) in depth.
Repair method:
Replace the fan stator assembly.
Subtask 72-00-21-220-027
(7)Dents on the flowpath surface of the inner platform:
Maximum serviceable limit:
Any amount, 0.030 inch (0.76 mm) in depth, 2.00 inches (50.8 mm) in length, 0.050 inch (1.27 mm) in width.
Maximum repairable limit:
0.040 inch (1.02 mm) in depth.
Repair method:
Blend. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Subtask 72-00-21-220-049
(8)Fretting on the inner mounting flange inner flange face:
Maximum serviceable limit:
Any amount, 0.010 inch (0.25 mm) in depth after removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Repair method:
Replace the fan stator assembly.
Subtask 72-00-21-220-050
(9)Missing, disbonded or damaged metal covers on the outer diameter (OD) of the outer mounting flange:
Maximum serviceable limit:
Not serviceable.
Maximum repairable limit:
Any amount.
Repair method:
Replace metal cover with MIL-P-19834 or B12B27A2 (G13 material 0.008 inch PSA tape via 3M Co. designated Y435).
Subtask 72-00-21-220-072
* * * PRE SB   72-0156( PIP2 Configuration )
(10)Missing, disbonded or damaged metal covers on the inner diameter (ID) of the inner mounting flange of OGVs 41 thru 9 (numbers in accordance with Figure 811):
Maximum serviceable limit:
Any amount.
Maximum repairable limit:
None.
Repair method:
None.
Subtask 72-00-21-220-080
(11)Missing, disbonded or damaged metal covers on the ID of the inner mounting flange of OGVs 10 thru 40 (numbers in accordance with Figure 811):
Maximum serviceable limit:
Not serviceable.
Maximum repairable limit:
Any amount.
Repair method:
Replace metal cover with MIL-P-19834 or B12B27A2 (G13 material 0.008 inch PSA tape via 3M Co. designated Y435).
* * * END PRE SB   72-0156( PIP2 Configuration )
Subtask 72-00-21-220-081
* * * SB   72-0417( Elastomer Plug Configuration )
(12)Missing, disbonded or damaged rubber plug on the ID of the inner mounting flange:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the plug.
* * * END SB   72-0417
Subtask 72-00-21-220-085
(13)Corrosion on trailing edge of the lower OGV pylon:
Maximum serviceable limit:
Not serviceable.
Repair method:
Do the steps that follow:
(a)Remove affected nut plate.
(b)Remove the corrosion by blending. Minimum permitted wall thickness after blend is 0.115 inch (2.92 mm). Blend to a smooth contour with surrounding area. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).
(c)Do a local touch-up and paint at the repair area with missing paint. Refer to Subtask 72-00-21-220-051 (paragraph 4.K.(13)).
(d)Install the nut plate. Use wet installation method. Refer to TASK 70-13-00-390-001 (RIVETED JOINTS).
Subtask 72-00-21-220-051
(14)Missing paint:
Maximum serviceable limit:
Any amount, not more than 50 percent.
Maximum repairable limit:
Any amount.
Repair method:
Do the steps that follow:
WARNING:
ACETONE IS EXPLOSIVE, AN IRRITANT, AN ALLERGEN, AND HAS POISONOUS DETERIORATION. USE VAPOR/FUME CONTROL OR USE A RESPIRATOR.
WARNING:
ISOPROPYL ALCOHOL IS TOXIC AND FLAMMABLE. USE PERSONAL PROTECTION EQUIPMENT. USE IN A WELL-VENTILATED AREA.
(a)Solvent wipe the area that has missing paint. Use C04-003   acetone or C04-035  isopropyl alcohol to clean the fan OGV. Refer to TASK 70-46-01-350-030 (MASKING AND CLEANING OF EPOXY AND POLYESTER MATRIX THERMOSETTING COMPOSITE MATERIALS).
(b)Touch-up the area. Apply coating to the area. Refer to TASK 70-43-07-380-007 (CHEMICAL TOUCH-UP SURFACE REFINISHING PROCESS FOR ALUMINUM).
1Wipe all unwanted solution.
(c)Apply C03-007  primer, C03-079  primer, C03-085  primer, or C03-100  primer to the chemical touch-up areas to a dry thickness of 0.0002-0.0006 inch (0.005-0.015 mm). Refer to TASK 70-43-22-380-014 (PAINT - EPOXY COATING FOR ALUMINUM AND FERROUS ALLOYS).
(d)Apply C03-119  polyurethane coating to the epoxy primed areas to a dry thickness of 0.001-0.005 inch (0.026-0.12 mm). Refer to TASK 70-43-22-380-014 (PAINT - EPOXY COATING FOR ALUMINUM AND FERROUS ALLOYS).
Subtask 72-00-21-220-079
(15)Missing sealant in the spaces of the OGV platforms (at OGV inner diameter). Refer to Figure 812:
Maximum serviceable limit:
Any amount, as long as RTV is present between the OGVs and seals a space between the OGV platforms.
Maximum repairable limit:
Any amount.
Repair method:
Replace the sealant between the OGV platforms as follows:
(a)Remove all the existing RTV sealant around the OGV platforms and in the seams with a non-metallic spatula.
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.
(b)Use a clean cloth moistened with C04-035  isopropyl alcohol to clean all surfaces.
Subtask 72-00-21-350-001
(c)Alternative Procedure Available. Apply sealant between the OGV platforms as follows:
1The total width of the C01-176  RTV 133 and the space must be approximately 0.500-0.625 inch (12.70-15.88 mm). Make sure that the space width is the same for all locations.
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.
2Apply C01-159  RTV primer to all surfaces where sealant is needed. Let the RTV primer dry for 15 minutes.
3Apply C01-176  RTV 133 to the spaces between the OGV platforms. If necessary, use C10-012  tape and a caulking gun to apply the sealant.
4Make the contour of the C01-176  RTV 133 flush with, or below, the surface of the OGV platform, and make all changes in the contour smooth. Do no let any of the contour surfaces be irregular.
5Let the C01-176  RTV 133 cure according to the manufacturer's instructions.
Subtask 72-00-21-350-002
(c).A.Alternative Procedure. Apply sealant between the OGV platforms as follows:
1The total width of the C01-218  adhesive system and the space must be approximately 0.500-0.625 inch (12.70-15.88 mm). Make sure that the space width is the same for all locations.
2Apply C01-217  primer to all surfaces where sealant is needed. Let the primer dry for 30 minutes.
3Apply C01-218  adhesive system to the spaces between the OGV platforms. If necessary, use C10-012  tape and a caulking gun to apply the sealant.
NOTE:
When applied, C01-218  adhesive system is in a shade of gray.
4Make the contour of the C01-218  adhesive system flush with, or below, the surface of the OGV platform, and make all changes in the contour smooth. Do not let any of the contour surfaces be irregular.
5Let the C01-218  adhesive system cure according to the manufacturer's instructions.
* * * FOR ALL
Figure 811   Fan Outlet Guide Vanes - Inspection Areas
* * * FOR ALL
Figure 812   OGV Inner Platform Sealant with Serviceable Missing RTV
* * * FOR ALL
Figure 813   (Sheet 1 ) Trenchfiller Panel Facesheet - Repair Areas
* * * FOR ALL
Figure 813   (Sheet 2 ) Trenchfiller Panel Facesheet - Repair Areas
* * * FOR ALL
Figure 814   Trenchfiller Panel Facesheet - Typical Defects
* * * FOR ALL
Figure 815   (Sheet 1 ) Forward Containment Case - Forward Acoustic Treatment Closeout Plies
* * * FOR ALL
Figure 815   (Sheet 2 ) Forward Containment Case - Forward Acoustic Treatment Closeout Plies