* * * FOR ALL
TASK 72-30-01-200-801
1 . General.
A.This procedure gives instructions to do an inspection of the high pressure compressor (HPC) stator extension case (extension case) (10-080 , 72-30-00) (SIN 080AL).
2 . Tools, Equipment, and Materials.
NOTE:
You can use equivalent alternatives for tools, equipment, and consumable materials.
A.Tools and Equipment.
(1)Special Tools.
 
Tool No.
Description
 
7C2000P01
Inspection System - Rotor Components/Assembly (rotor/stator components inspection system)
NOTE:
Alternative methods can be used until the limits agree with the inspection requirements.
(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
 
70-33-03
Special Inspection for Surface Fretting or Galling
 
70-42-00
Blending and Removal of High Metal Procedures
D.Expendable Parts. None.
3 . Specific Inspection Procedure.
Subtask 72-30-01-230-003
A.Do a Class A fluorescent penetrant inspection of the outer surface and inner aft flange extension case. Refer to TASK 70-32-02-230-001 (FLUORESCENT PENETRANT INSPECTION).
4 . Visual Inspection.
Refer to Figure 801.
Subtask 72-30-01-220-021
A.Do an inspection of all surfaces as follows:
(1)Cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the extension case.
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Figure 801   (Sheet 1 ) Extension Case - Reference Areas
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Figure 801   (Sheet 2 ) Extension Case - Reference Areas
Subtask 72-30-01-220-022
(2)Nicks, pits, scores, and scratches:
Maximum serviceable limit:
Any amount, any length, 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).
Maximum repairable limit:
Any amount, any length, 0.020 inch (0.51 mm) in depth, with a minimum radius of 0.050 inch (1.27 mm) at the bottom.
Repair method:
Blend. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).
Subtask 72-30-01-220-023
(3)Hot spots (discoloration):
Maximum serviceable limit:
Serviceable if the metal is not crazed, and if there are no cracks.
Repair method:
Replace the extension case.
Subtask 72-30-01-220-024
(4)Corrosion, discoloration on the extension case surfaces:
Maximum serviceable limit:
Any amount.
Repair method:
Replace the extension case.
Subtask 72-30-01-220-025
B.Do an inspection of the circumferential flanges for:
(1)Cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the extension case.
Subtask 72-30-01-220-056
(2)Indentations on mating surface G. Refer to Figure 802.
Maximum serviceable limit:
One indentation per bolthole location between holes 15-16, 30-31, 45-46, 59-60, 74-75, and 85-86, not to exceed six indentations, 0.020 inch (0.50 mm) in depth and 0.300 inch (7.62 mm) in diameter after removal of high metal. Refer to Figure 801 and TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Repair method:
Replace the extension case.
Subtask 72-30-01-220-026
(3)Nicks and scratches on mating surfaces:
Maximum serviceable limit:
Any amount, 0.005 inch (0.13 mm) in depth, if the defect does not extend fully across mating surfaces.
Maximum repairable limit:
Any amount, any length, 0.010 inch (0.25 mm) in depth, if the repair does not extend fully across mating surfaces after blending.
Repair method:
Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).
Subtask 72-30-01-220-027
(4)Fretting or galling on the mating surface:
Maximum serviceable limit:
Any amount, if in the limits of TASK 70-33-03-220-006 (SPECIAL INSPECTION FOR SURFACE FRETTING OR GALLING).
Maximum repairable limit:
Any amount, 0.004 inch (0.10 mm) in depth.
Repair method:
Blend. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).
Subtask 72-30-01-220-051
C.Do an inspection of the air manifold pads, eductor air tube pads, and bracket pads for:
(1)Cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the extension case.
Subtask 72-30-01-220-052
(2)Nicks, scores, and scratches:
Maximum serviceable limit:
Not serviceable.
Maximum repairable limit:
Any amount, 0.008 inch (0.20 mm) in depth after removal of high metal.
Repair method:
Blend to remove nicks, scores, and scratches. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).
Subtask 72-30-01-220-033
D.Do an inspection of the borescope ports for:
(1)Damaged threads:
Maximum serviceable limit:
One full thread, total (cumulative) or continuous can be missing after the removal of damage, if no less than half of the lead-in thread remains.
Repair method:
Blend to remove the damaged area. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Subtask 72-30-01-220-034
* * * PRE SB   72-0344
E.Do an inspection of the insert for:
(1)Loss of self-locking quality (0.250-28UNJF):
Maximum serviceable limit:
Not serviceable if run-on torque is less than 3.5 lb in. (0.40 N.m).
Repair method:
Replace the insert. Refer to TASK 72-30-01-300-801 (72-30-01, REPAIR 001).
Subtask 72-30-01-220-079
(2)Loss of self-locking quality at the ECS pad (0.3125-24UNJF):
Maximum serviceable limit:
Not serviceable if run-on torque is less than 6.5 lb in. (0.73 Nm).
Repair method:
Replace the insert. Refer to TASK 72-30-01-300-801 (72-30-01, REPAIR 001) .
Subtask 72-30-01-220-035
(3)Looseness or missing:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the insert. Refer to TASK 72-30-01-300-801 (72-30-01, REPAIR 001).
* * * END PRE SB   72-0344
Subtask 72-30-01-220-080
* * * SB   72-0344
E.A.Do an inspection of the key-locked insert for:
(1)Loss of self-locking quality:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the key-locked insert(s). Refer to TASK 72-30-01-300-804 (72-30-01, REPAIR 003).
Subtask 72-30-01-220-081
(2)Looseness or missing:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the key-locked insert(s). Refer to TASK 72-30-01-300-804 (72-30-01, REPAIR 003).
* * * END SB   72-0344
Subtask 72-30-01-220-036
F.Do an inspection of the nut assembly for:
(1)Loss of self-locking quality (0.250-28 UNJF):
Maximum serviceable limit:
Not serviceable if run-on torque is less than 3.5 lb in. (0.40 N.m).
Maximum repairable limit:
Any amount.
  Repair method:
Repair. Refer to TASK 72-30-01-300-806 (72-30-01, REPAIR 005).
Subtask 72-30-01-220-037
(2)Damaged threads:
Maximum serviceable limit:
Not serviceable.
Maximum repairable limit:
Any amount.
  Repair method:
Repair. Refer to TASK 72-30-01-300-806 (72-30-01, REPAIR 005).
Subtask 72-30-01-220-040
(3)Missing nut:
Maximum serviceable limit:
Not serviceable.
Maximum repairable limit:
Any amount.
  Repair method:
Repair. Refer to TASK 72-30-01-300-806 (72-30-01, REPAIR 005).
Subtask 72-30-01-220-084
* * * PRE SB   72-0344
G.Do an inspection of the threaded holes if the insert is removed for. Refer to TASK 72-30-01-300-801 (72-30-01, REPAIR 001).
(1)Damaged threads:
Maximum serviceable limit:
First full thread only.
Repair method:
Repair. Refer to TASK 72-30-01-300-805 (72-30-01, REPAIR 004).
Subtask 72-30-01-220-085
(2)Do a No-go pin gauge inspection of the threaded holes:
Maximum serviceable limit:
0.2880 inch (7.315 mm) pin gauge must not extend more than the first thread.
Repair method:
Repair. Refer to TASK 72-30-01-300-805 (72-30-01, REPAIR 004).
* * * END PRE SB   72-0344
5 . Dimensional Inspection.
Subtask 72-30-01-220-041
A.Measure all dimensions in free state as follows. Refer to Figure 802.
(1)Reference axis 1 established by surface A and diameter B.
(2)Reference axis 2 established by diameter B and diameter K.
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Figure 802   Extension Case - Dimensional Inspection
Subtask 72-30-01-220-042
B.Measure each diameter at 10 equally-spaced locations. Calculate the average diameter dimension. Compare the average diameter to the dimensions given in the dimensional inspection. Refer to Figure 802.
Subtask 72-30-01-220-043
C.Measure the diameters as follows. Refer to Figure 802.
(1)Diameter B:
Minimum serviceable limit:
32.306 inches (820.57 mm).
Maximum serviceable limit:
32.314 inches (820.78 mm).
Repair method:
Repair. Refer to TASK 72-30-01-300-802 (72-30-01, REPAIR 002).
Subtask 72-30-01-220-044
(2)Diameter K:
Minimum serviceable limit:
34.345 inches (872.36 mm).
Maximum serviceable limit:
34.358 inches (872.69 mm).
Repair method:
Repair. Refer to TASK 72-30-01-300-802 (72-30-01, REPAIR 002).
Subtask 72-30-01-220-045
(3)Diameter F:
  Minimum serviceable limit:
27.616 inches (701.45mm).
Maximum serviceable limit:
27.632 inches (701.85 mm).
Repair method:
Repair. Refer to TASK 72-30-01-300-802 (72-30-01, REPAIR 002).
Subtask 72-30-01-220-046
(4)Diameter H:
  Minimum serviceable limit:
29.696 inches (754.28 mm).
Maximum serviceable limit:
29.712 inches (754.68 mm).
Repair method:
Repair. Refer to TASK 72-30-01-300-802 (72-30-01, REPAIR 002).
Subtask 72-30-01-220-053
(5)Surface A flatness:
Maximum serviceable limit:
0.003 inch (0.08 mm).
Repair method:
Repair. Refer to TASK 72-30-01-300-802 (72-30-01, REPAIR 002).
Subtask 72-30-01-220-054
(6)Surface G perpendicular to reference axis 2:
Maximum serviceable limit:
0.002 inch (0.05 mm).
Repair method:
Repair. Refer to TASK 72-30-01-300-802 (72-30-01, REPAIR 002).
Subtask 72-30-01-220-055
(7)Surface C perpendicular to reference axis 2:
Maximum serviceable limit:
0.002 inch (0.05 mm).
Repair method:
Repair. Refer to TASK 72-30-01-300-802 (72-30-01, REPAIR 002).
Subtask 72-30-01-220-059
(8)Surface D parallel to surface A:
Maximum serviceable limit:
0.002 inch (0.05 mm).
Repair method:
Repair. Refer to TASK 72-30-01-300-802 (72-30-01, REPAIR 002).
Subtask 72-30-01-220-060
(9)Diameter B roundness:
Maximum serviceable limit:
0.003 inch (0.08 mm).
Repair method:
Repair. Refer to TASK 72-30-01-300-802 (72-30-01, REPAIR 002).
Subtask 72-30-01-220-061
(10)Diameter H roundness:
Maximum serviceable limit:
0.003 inch (0.08 mm).
Repair method:
Repair. Refer to TASK 72-30-01-300-802 (72-30-01, REPAIR 002).
Subtask 72-30-01-220-062
(11)Diameter F roundness:
Maximum serviceable limit:
0.003 inch (0.08 mm).
Repair method:
Repair. Refer to TASK 72-30-01-300-802 (72-30-01, REPAIR 002).
Subtask 72-30-01-220-063
(12)Diameter K roundness:
Maximum serviceable limit:
0.003 inch (0.08 mm).
Repair method:
Repair. Refer to TASK 72-30-01-300-802 (72-30-01, REPAIR 002).
Subtask 72-30-01-220-064
(13)Diameter K concentric with reference axis 1:
Maximum serviceable limit:
0.002 inch (0.05 mm).
Repair method:
Repair. Refer to TASK 72-30-01-300-802 (72-30-01, REPAIR 002).
Subtask 72-30-01-220-065
(14)Diameter H concentric with reference axis 2:
Maximum serviceable limit:
0.002 inch (0.05 mm).
Repair method:
Repair. Refer to TASK 72-30-01-300-802 (72-30-01, REPAIR 002).
Subtask 72-30-01-220-066
(15)Diameter F concentric with reference axis 2:
Maximum serviceable limit:
0.002 inch (0.05 mm).
Repair method:
Repair. Refer to TASK 72-30-01-300-802 (72-30-01, REPAIR 002).