* * * FOR ALL
TASK 72-31-40-200-801
1 . General.
A.This procedure gives instructions to do an inspection of the HPC rotor cone shaft (cone shaft):
•
(01-780 , 72-31-00) (SIN 050B5)
•
(02-780 , 72-31-00) (SIN 050B5) (SB 72-0157 ).
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
 
72-33-04
Inspection Of Splines
 
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 72-31-40-230-001
A.Do a Class G fluorescent penetrant inspection of the cone shaft. Refer to TASK 70-32-02-230-001 (FLUORESCENT PENETRANT INSPECTION).
(1)Indications less than 0.015 inch (0.38 mm) are permitted.
4 . Visual Inspection.
Refer to Figure 801.
Subtask 72-31-40-220-001
A.Do an inspection of all surfaces for:
(1)Cracks:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the cone shaft.
* * * FOR ALL
Figure 801   Inspection Areas for the Cone Shaft
Subtask 72-31-40-220-002
B.Do an inspection of the oil distributer rabbet (diameter R) and rotating air seal rabbets (diameter AT and AU) for:
(1)Nicks, scores, galls, and scratches:
Maximum serviceable limit:
Any amount, 0.003 inch (0.08 mm) in depth, 0.020 inch (0.51 mm) wide after removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).
Repair method:
Replace the cone shaft.
Subtask 72-31-40-220-004
C.Do an inspection of the bearing journals (diameter Y and diameter N) and IGB horizontal bevel gear journal (diameter M) for:
(1)Nicks, scores, galls, and scratches:
Maximum serviceable limit:
Any amount, 0.003 inch (0.08 mm) in depth, 0.02 inch (0.5 mm) wide after removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).
Repair method:
Replace the cone shaft.
Subtask 72-31-40-220-005
(2)Coating wear:
Maximum serviceable limit:
Any amount if in serviceable limits of Subtask 72-31-40-220-029 (paragraph 5.B.(1)) and Subtask 72-31-40-220-034 (paragraph 5.B.(6)).
Repair method:
Replace the cone shaft.
Subtask 72-31-40-220-006
(3)Flaked, chipped, or missing coating:
Maximum serviceable limit:
Any amount if each chip is less than 0.01 sq inch (64.5 sq mm), and the total of all defects is less than 0.16 sq inch (1.0 sq cm) and all defects are separated by 0.100 inch (2.54 mm) or more from an adjacent area of missing coating.
Repair method:
Replace the cone shaft.
Subtask 72-31-40-220-007
D.Do an inspection of the threads for:
(1)Damage:
Maximum serviceable limit:
Not serviceable.
Maximum repairable limit:
Threads must be free of all high metal and pick-up. A total length of one-half of one full thread can be removed.
Repair method:
Remove high metal with a fine file or honing stone. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).
Subtask 72-31-40-220-008
(2)Thread tip bent back:
Maximum serviceable limit:
Any amount, 0.007 inch (0.18 mm).
Maximum repairable limit:
Any amount if major diameter is more than 6.036 inches (153.31 mm).
Repair method:
Remove high metal with a fine file or honing stone. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES).
Subtask 72-31-40-220-009
E.Do an inspection of the spline teeth for:
(1)Scratches:
Maximum serviceable limit:
Any amount, 0.010 inch (0.25 mm) in depth, 0.020 inch (0.51 mm) wide after removal of high metal. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES). No scratches permitted in the root area. The total area of scratches on each tooth must not be more than 10 percent of the tooth area.
Repair method:
Replace the cone shaft.
Subtask 72-31-40-220-010
(2)Nicks and dents:
Maximum serviceable 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). No defects permitted in the root area. The total area of the defects on each tooth must not be more than 10 percent of the tooth area.
Repair method:
Replace the cone shaft.
Subtask 72-31-40-220-011
(3)Wear and fretting:
Maximum serviceable limit:
Any amount if in limits of TASK 70-33-04-220-012 (INSPECTION OF SPLINES).
Repair method:
Replace the cone shaft.
Subtask 72-31-40-220-012
F.Do an inspection of the mating surfaces for:
(1)Fretting or galling on the bolt pads:
Maximum serviceable limit:
Any amount if in limits of TASK 70-33-03-220-006 (SPECIAL INSPECTION FOR SURFACE FRETTING OR GALLING) .
Repair method:
Replace the cone shaft.
Subtask 72-31-40-220-013
(2)Nicks, dents, pits, and scratches on the bolt pads:
Maximum serviceable limit:
Any amount, 0.001 inch (0.03 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 cone shaft.
Subtask 72-31-40-220-014
(3)Fretting, galling, and wear on surface W, surface D, and surface A:
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 cone shaft.
Subtask 72-31-40-220-015
G.Do an inspection of the boltholes for:
(1)Nicks, dents, pits, and scratches on the ID of the hole:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the cone shaft.
Subtask 72-31-40-220-016
(2)Nicks, dents, pits, and scratches on the hole chamfers:
Maximum serviceable limit:
Not serviceable.
Repair method:
Replace the cone shaft.
Subtask 72-31-40-220-017
(3)Fretting, galling, or wear:
Maximum serviceable limit:
Any amount if in limits of TASK 70-33-03-220-006 (SPECIAL INSPECTION FOR SURFACE FRETTING OR GALLING).
Repair method:
Replace the cone shaft.
Subtask 72-31-40-220-018
H.Do an inspection of rabbets (diameter AJ and diameter B) for:
(1)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 cone shaft.
Subtask 72-31-40-220-019
(2)Fretting, galling, or wear:
Maximum serviceable limit:
Any amount if in serviceable limits of Subtask 72-31-40-220-032 (paragraph 5.B.(4)) and Subtask 72-31-40-220-035 (paragrah 5.B.(7)).
Repair method:
Replace the cone shaft.
Subtask 72-31-40-220-020
I.Do an inspection of all other outer shaft surfaces for:
(1)Nicks, dents, pits, 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 cone shaft.
Subtask 72-31-40-220-022
J.Do an inspection of the inner shaft surface for:
(1)Scratches and dents:
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 cone shaft.
Subtask 72-31-40-220-023
K.Do an inspection of the locknut slots for:
(1)Fretting and wear (does not include the locking tab radius):
Maximum serviceable 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:
Repair. Refer to TASK 72-31-40-300-801 (72-31-40, REPAIR 001).
Subtask 72-31-40-220-044
(2)Nicks, dents, fretting, and wear on the locking tab radius:
Maximum serviceable 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:
Repair. Refer to TASK 72-31-40-300-801 (72-31-40, REPAIR 001).
5 . Special Dimensional Inspection.
Subtask 72-31-40-220-046
A.Do this special dimensional inspection only if a visual inspection shows any defect or other conditions that make a dimensional inspection necessary. Refer to Figure 801.
Subtask 72-31-40-220-024
B.Measure each diameter at eight equally spaced locations. Calculate the average diameter dimension. Compare the average diameter to the dimensions given in the dimensional inspection.
Subtask 72-31-40-220-029
C.Do a dimensional inspection of the cone shaft as follows:
(1)Diameter Y:
Minimum serviceable limit:
6.3304 inches (160.792 mm).
Maximum serviceable limit:
6.3310 inches (160.807 mm).
Repair method:
Replace the cone shaft.
Subtask 72-31-40-220-030
(2)Roundness of diameter Y:
Minimum serviceable limit:
0.0005 inch (0.013 mm) in the free state.
Repair method:
Replace the cone shaft.
Subtask 72-31-40-220-031
(3)Diameter M:
Minimum serviceable limit:
6.0967 inches (154.856 mm).
Maximum serviceable limit:
6.0973 inches (154.871 mm).
Repair method:
Replace the cone shaft.
Subtask 72-31-40-220-032
(4)Diameter AJ:
Minimum serviceable limit:
15.416 inches (391.57 mm).
Maximum serviceable limit:
15.421 inches (391.69 mm).
Repair method:
Replace the cone shaft.
Subtask 72-31-40-220-033
(5)Runout of diameter B in relation to diameter Y:
Minimum serviceable limit:
0.000 inch (0.00 mm).
Maximum serviceable limit:
0.001 inch (0.03 mm).
Repair method:
Replace the cone shaft.
Subtask 72-31-40-220-034
(6)Diameter N:
Minimum serviceable limit:
6.3129 inches (160.348 mm).
Maximum serviceable limit:
6.3137 inches (160.368 mm).
Repair method:
Replace the cone shaft.
Subtask 72-31-40-220-035
(7)Diameter B:
Minimum serviceable limit:
15.660 inches (397.76 mm).
Maximum serviceable limit:
15.664 inches (397.87 mm).
Repair method:
Replace the cone shaft.
Subtask 72-31-40-220-036
(8)Diameter AT:
Minimum serviceable limit:
6.9693 inches (177.020 mm).
Maximum serviceable limit:
6.9707 inches (177.056 mm).
Repair method:
Replace the cone shaft.
Subtask 72-31-40-220-045
(9)Diameter AU:
Minimum serviceable limit:
6.9583 inches (176.741 mm).
Maximum serviceable limit:
6.9597 inches (176.776 mm).
Repair method:
Replace the cone shaft.
Subtask 72-31-40-220-038
(10)Diameter R:
Minimum serviceable limit:
6.3174 inches (160.462 mm).
Maximum serviceable limit:
6.3182 inches (160.482 mm).
Repair method:
Replace the cone shaft.
Subtask 72-31-40-220-039
(11)Runout of surface A in relation with the axis of diameter Y:
Minimum serviceable limit:
0.000 inch (0.00 mm).
Maximum serviceable limit:
0.005 inch (0.13 mm) in the free state.
Repair method:
Replace the cone shaft.
Subtask 72-31-40-220-041
(12)Diameter Z:
Minimum serviceable limit:
5.905 inches (149.99 mm).
Maximum serviceable limit:
5.915 inches (150.24 mm).
Repair method:
Replace the cone shaft.