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TASK 72-31-47-200-801
1 . General.
A.This procedure gives instructions to do an inspection of the tube support ring:
•
(01-580 , 72-31-00) (SIN 050AM)
•
(02-580 , 72-31-00) (SIN 050AM) (SB 72-0157 ).
B.Deleted.
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
 
70-33-03
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.
NOTE:
Any findings beyond manual limits that may be indicative of a possible crack and/or metallurgical defect must be reported to GE through a myGEAviation Technical Inquiry.
Subtask 72-31-47-230-001
A.Do a Class G fluorescent penetrant inspection of the tube support ring. Refer to TASK 70-32-02-230-001 (FLUORESCENT PENETRANT INSPECTION).
(1)Indications 0.015 inch (0.38 mm) or less are permitted.
4 . Visual Inspection.
Refer to Figure 801.
Subtask 72-31-47-220-025
A.Do an inspection of the coated area on the ID of the tube support ring for:
(1)Missing coating:
Maximum serviceable limit:
Any amount, if chip is less than 0.049 sq in. (31.61 sq mm). The maximum total area of missing coating must be less than 0.13 sq in. (83.9 sq mm).
Repair method:
Repair. Refer to TASK 72-31-47-300-801 (72-31-47, REPAIR 001) .
Subtask 72-31-47-220-026
(2)Coating wear:
Maximum serviceable limit:
Any amount, if in dimensional limit. Refer to Subtask 72-31-47-220-019 (paragraph 5.B.(1)).
Repair method:
Repair. Refer to TASK 72-31-47-300-801 (72-31-47, REPAIR 001) .
Subtask 72-31-47-220-001
B.Do an inspection of the mating face for:
(1)Pickup and high metal:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the tube support ring.
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Figure 801   Areas of the Tube Support Ring - Inspection
Subtask 72-31-47-220-002
(2)Nicks, dents, pits, and scratches:
Maximum serviceable limit:
Any amount, 0.002 inch (0.05 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 tube support ring.
Subtask 72-31-47-220-003
(3)Fretting, galling, and wear:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the tube support ring.
Subtask 72-31-47-220-006
C.Do an inspection of the rabbet (diameter E) as follows. Refer to Figure 802.
(1)Nicks, dents, pits, and scratches:
Maximum serviceable limit:
Any amount, any length, 0.002 inch (0.05 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 tube support ring.
Subtask 72-31-47-220-007
(2)Fretting, galling, and wear:
Maximum serviceable limit:
Any amount in limits of TASK 70-33-03-220-006 (SPECIAL INSPECTION FOR SURFACE FRETTING OR GALLING) and in the serviceable limits of Subtask 72-31-47-220-018 (paragraph 5.).
Repair method:
Replace the tube support ring.
Subtask 72-31-47-220-008
D.Do an inspection of the tube threads for. Refer to Figure 801.
(1)Nicks, dents, pits, and scratches on the inside diameter:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the tube support ring.
Subtask 72-31-47-220-009
(2)Fretting, galling, and wear:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the tube support ring.
Subtask 72-31-47-220-013
E.Do an inspection of the axial and radial retaining ring mating faces for:
(1)Cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the tube support ring.
Subtask 72-31-47-220-014
(2)Nicks, dents, pits, and scratches:
Maximum serviceable limit:
Any amount, 0.004 inch (0.10 mm) in depth.
Repair method:
Replace the tube support ring.
Subtask 72-31-47-220-015
(3)Wear or fretting:
Maximum serviceable limit:
Any amount, 0.002 inch (0.05 mm) in depth.
Repair method:
Replace the tube support ring.
Subtask 72-31-47-220-016
F.Do an inspection of all other surfaces for:
(1)Cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the tube support ring.
Subtask 72-31-47-220-017
(2)Nicks, dents, pits, and scratches:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the tube support ring.
Subtask 72-31-47-220-027
G.Do an inspection of the key ring for:
(1)Nicks, dents and scratches:
Maximum serviceable limit:
Any amount, not more than 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 key ring.
Subtask 72-31-47-220-028
(2)Wrench slot deformation:
Maximum serviceable limit:
Any amount if the maximum wrench slot width is 0.425 inch (10.80 mm) (measured at wrench slot tang ID). Remove any high metal from wrench slot tang ID edges. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES) .
Repair method:
Replace the key ring.
5 . Special Dimensional Inspection.
NOTE:
Do this special dimensional inspection only if a visual inspection or other defect conditions make it necessary to do a dimensional inspection.
Subtask 72-31-47-220-018
A.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.
Subtask 72-31-47-220-019
B.Measure the dimensions as follows:
(1)Diameter C:
Minimum serviceable limit:
6.298 inches (159.97 mm).
Maximum serviceable limit:
6.302 inches (160.07 mm).
Repair method:
Repair. Refer to TASK 72-31-47-300-801 (72-31-47, REPAIR 001) .
Subtask 72-31-47-220-020
(2)Diameter E:
Minimum serviceable limit:
6.648 inches (168.86 mm).
Maximum serviceable limit:
6.652 inches (168.96 mm).
Repair method:
Replace the tube support ring.
Subtask 72-31-47-220-021
(3)Diameter F:
Minimum serviceable limit:
0.825 inch (20.96 mm).
Maximum serviceable limit:
0.835 inch (21.21 mm).
Repair method:
Replace the tube support ring.
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Figure 802   Tube Support Ring - Dimensional Inspection