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TASK 72-53-41-300-805
1 . Post Inspection Shotpeening Repair.
A.This procedure gives instructions to repair high pressure turbine rotor stage 2 disk (disk) by doing a shotpeening procedure. Refer to Figure 901.
B.The following maximum repairable limits apply to this repair:
NOTE:
The information below gives maximum repairable limits for the applicable Inspection sections. The paragraphs are numbered the same as the manual Inspection sections.
(6)Post Inspection Procedure.
(a)Shotpeen the surfaces in the marked zones. Refer to Figure 804 and TASK 72-53-41-300-805 (72-53-41, REPAIR 006).
Maximum Repairable Limit:
Any amount.
C.The subsequent table gives a list of the part numbers that are applicable to this repair. All part numbers are applicable to all paragraphs unless specified differently.
 
Part Number(s)
 
2300M84P02  
2383M86P02  
2383M86P03  
2445M92P01  
D.Proprietary/Complex Process Statement.
(1)None.
2 . Tools, Equipment, and Materials.
NOTE:
Repair sources can use equivalent alternatives for tools, equipment, and consumable materials, however, the repair source must demonstrate and document equivalency.
A.Tools and Equipment.
(1)Special Tools. None.
(2)Standard Tools and Equipment. None.
(3)Locally Manufactured Tools. None.
B.Consumable Materials.
 
Code No.
Description
 
C04-166
Shot, Peening, Conditioned Cut Wire (CCW14 steel shot)
 
C10-021
Tape, Plastic
 
C10-205
Almen Test Strips (Type N)
C.Referenced Procedures.
 
ATA No.
Description
 
70-21-00
Chemical Cleaning
 
70-21-03
Cleaning Method No. 3 - Steam Cleaning
 
70-47-01
Shotpeening
 
72-53-41
Cleaning 001
 
72-53-41
Inspection 001
D.Expendable Parts. None.
E.SPD Information.
(1)Spares Supplied. None.
(2)Protected Spares. None.
(3)Locally Manufactured Spares. None.
F.Special Solutions. None.
G.Test Specimens. None.
3 . Dimensional Information.
Subtask 72-53-41-220-133
A.Refer to Figure 901 for specified dimensions and locations.
NOTE:
The dimensional data identified within this procedure was designed using inches as the base unit of measurement for dimensional values. The conversion to millimeters is rounded to one less decimal digit than inches. For minimum dimensions, converted values are rounded up. For maximum dimensions, converted values are rounded down. To avoid conversion errors, do not re-convert from millimeters to inches.
NOTE:
Reference dimensions do not require inspection.
4 . Setup Information.
None.
5 . Procedure.
Subtask 72-53-41-160-004
A.If necessary, clean the disk. Refer to TASK 72-53-41-100-801 (72-53-41, CLEANING 001).
Subtask 72-53-41-380-003
B.Peen the disk surfaces in the marked zones. Refer to TASK 70-47-01-380-016 (SHOTPEENING), Figure 901, Figure 902, and do as follows:
NOTE:
It is not necessary to peen again the zones that were peened during the repair cycle. Peening is necessary only for the zones that were not peened during the repair cycle.
(1)Apply masking with C10-021  plastic tape to all areas that you will not peen. Refer to Figure 901.
NOTE:
It is not permitted to peen the spline.
(2)Use C04-166  CCW14 steel shot.
(3)Peen to an intensity of 0.006-0.012 N.
(4)Coverage must be a minimum of 125 percent.
(5)Direct impingement is necessary.
(6)Impingement angle must be a minimum of 35 degrees.
(7)Overspray is permitted in the areas adjacent to repair areas.
NOTE:
It is not permitted to peen the spline.
(8)Refer to Figure 902 for intensity verification locations and as follows:
(a)Do an inspection of the intensity in all the disk repaired areas with C10-205  Almen test strips and an Almen test strip holder.
(b)Use a scrap part fixture for dovetail slot areas and a simulative fixture for other peened zones.
(9)Remove the masking.
WARNING:
USE EYE PROTECTION WHEN YOU USE COMPRESSED AIR TO CLEAN, COOL, OR DRY PARTS OR TOOLS. PARTICLES CAN CAUSE AN INJURY TO YOUR EYES. ENSURE COMPRESSED AIR PRESSURE IS LESS THAN 30 PSIG (207 KPA). DO NOT POINT COMPRESSED AIR AT YOURSELF OR OTHER PERSONS.
(10)Use clean shop air to remove remaining particles from the disk.
Subtask 72-53-41-160-005
C.If necessary, clean the disk. Refer to TASK 70-21-00-110-051 (CHEMICAL CLEANING) and TASK 70-21-03-160-001 (CLEANING METHOD NO. 3 - STEAM CLEANING).
Subtask 72-53-41-220-134
D.Do a final visual inspection of the disk. Refer to TASK 72-53-41-200-801 (72-53-41, INSPECTION 001).
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Figure 901   (Sheet 1 ) High Pressure Turbine Rotor Stage 2 Disk - Necessary Shotpeening Zones
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Figure 901   (Sheet 2 ) High Pressure Turbine Rotor Stage 2 Disk - Necessary Shotpeening Zones
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Figure 902   High Pressure Turbine Rotor Stage 2 Disk - Shotpeening Intensity Verification