* * * FOR ALL
TASK 72-32-06-200-801
1 . General.
A.This procedure gives instructions to do an inspection of the high pressure compressor (HPC) stator stage 4 interstage seals (interstage seals) (076A4, 076AD).
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
 
70-32-02
Fluorescent Penetrant Inspection
 
70-32-03
Spot-Fluorescent-Penetrant Inspection
 
70-42-00
Blending and Removal of High Metal Procedures
D.Expendable Parts. None.
3 . Specific Inspection Procedure.
Subtask 72-32-06-230-001
A.Alternative Procedure Available. Do a Class A fluorescent penetrant inspection. Refer to TASK 70-32-02-230-001 (FLUORESCENT PENETRANT INSPECTION). FPI solution is not permitted in the honeycomb cell.
Subtask 72-32-06-230-002
A.A.Alternative Procedure. Do a spot-fluorescent-penetrant inspection. Refer to TASK 70-32-03-230-002 (SPOT-FLUORESCENT-PENETRANT INSPECTION).
4 . Visual Inspection.
Refer to Figure 801.
Subtask 72-32-06-220-001
A.Do an inspection of the seal hanger for:
(1)Cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the interstage seal.
* * * FOR ALL
Figure 801   Interstage Seal
Subtask 72-32-06-220-002
(2)Nicks, dents, and scores:
Maximum serviceable limit:
Any amount, 0.010 inch (0.25 mm) in depth, after the removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).
Repair method:
Replace the interstage seal.
Subtask 72-32-06-220-003
(3)Distortion (warped):
Maximum serviceable limit:
Any amount, if assembly can be done.
Maximum repairable limit:
Any amount.
Repair method:
Straighten. Do an inspection for cracks, or replace the interstage seal.
Subtask 72-32-06-220-004
(4)Discoloration or pitting:
Maximum serviceable limit:
0.005 inch (0.13 mm) in depth.
Repair method:
Replace the interstage seal.
Subtask 72-32-06-220-005
(5)Scratches:
Maximum serviceable limit:
0.002 inch (0.05 mm) in depth.
Repair method:
Replace the interstage seal.
Subtask 72-32-06-220-006
(6)Fretting or wear on the circumferential edges:
Maximum serviceable limit:
Any amount, 0.004 inch (0.10 mm) in depth.
Repair method:
Replace the interstage seal.
Subtask 72-32-06-220-007
(7)Fretting or wear at both ends of the seal hanger (does not include stops):
Maximum serviceable limit:
Any amount, 0.004 inch (0.10 mm) in depth.
Repair method:
Repair. Refer to TASK 72-32-06-300-801 (72-32-06, REPAIR 001).
Subtask 72-32-06-220-008
(8)Deleted.
Maximum serviceable limit:
Deleted.
Repair method:
Deleted.
Subtask 72-32-06-220-009
B.Do an inspection of the honeycomb for:
(1)Grooves:
Maximum serviceable limit:
Any amount, 0.070 inch (1.78 mm) in depth, 0.210 inch (5.33 mm) in width on full 180 degree arc.
NOTE:
Measured maximum grooves include new make pre-grooves and seal tooth rubs into honeycomb seal from engine operation.
Repair method:
Repair. Refer to TASK 72-32-06-300-801 (72-32-06, REPAIR 001).
Subtask 72-32-06-220-010
(2)Damaged or missing cells:
Maximum serviceable limit:
Any amount, 0.125 inch (3.18 mm) long at the ends. Other areas, 2.5 sq in. (16 sq cm), no closer than 1.0 inch (25 mm).
Repair method:
Repair. Refer to TASK 72-32-06-300-801 (72-32-06, REPAIR 001).
Subtask 72-32-06-220-011
(3)Nicks, dents, pits, gouges, and tears:
Maximum serviceable limit:
Any amount to a total depth of 0.07 inch (1.8 mm), with rub mark less than 0.04 inch (1.0 mm) in depth.
Repair method:
Repair. Refer to TASK 72-32-06-300-801 (72-32-06, REPAIR 001).
Subtask 72-32-06-220-012
C.Do an inspection of the stops:
(1)Missing or looseness:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the interstage seal.
Subtask 72-32-06-220-013
(2)Wear:
Maximum serviceable limit:
Any amount, 0.004 inch (0.10 mm) in depth.
Repair method:
Replace the interstage seal.