* * * FOR ALL
TASK 72-31-42-300-802
1 . Repair for the High Pressure Compressor Stage 2 Blisk.
A.This procedure gives instructions to repair the high pressure compressor stage 2 blisk (blisk) by blending. 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.
(5)Visual Inspection.
(f)Do an inspection of the flowpath surface of the blisk for:
1Nicks, dents, pits, and scratches:
Maximum repairable limit:
Any amount to a maximum depth of 0.005 inch (0.12 mm), if they are in the repair areas in Figure 902.
(j)Do an inspection of the bolt pads for:
2Nicks, dents, pits, and scratches:
Maximum repairable limit:
Any amount to a maximum depth of 0.005 inch (0.12 mm), if they are in the repair areas in Figure 902.
(k)Do an inspection on forward and aft damper tabs for:
2Nicks, dents, pits, and scratches:
Maximum repairable limit:
Any amount to a maximum depth of 0.005 inch (0.12 mm), if they are in the repair areas in Figure 902.
(l)Do an inspection of the disk bore for:
1Nicks, dents, pits, or scratches:
Maximum repairable limit:
Any amount to a maximum depth of 0.005 inch (0.12 mm), if they are in the repair areas in Figure 902.
(m)Do an inspection of the disk webs for:
1Nicks, dents, pits, or scratches:
Maximum repairable limit:
Any amount to a maximum of 0.005 inch (0.12 mm) in depth, if they are in the repair areas in Figure 902.
(n)Do an inspection of the disk forward and aft rabbet for:
1Gouges, nicks, dents, pits and scratches:
Maximum repairable limit:
Any amount to a maximum depth of 0.005 inch (0.12 mm).
(o)Do an inspection of the disk bolthole for:
1Nicks, dents, pits, or scratches in the inner diameter of the bolthole:
Maximum repairable limit:
Not repairable.
2Nicks, dents, pits, or scratches in the bolthole chamfers:
Maximum repairable limit:
Not repairable.
(p)Do an inspection of the disk forward lower fillet (area XX) for:
1Nicks, dents, pits, or scratches:
Maximum repairable limit:
Not repairable.
(q)Do an inspection of the disk aft lower fillet (area AH) for:
1Nicks, dents, pits, or scratches:
Maximum repairable limit:
Any amount to a maximum depth of 0.005 inch (0.12 mm) with a minimum blend radius of 0.065 inch (1.66 mm).
(r)Do an inspection of all other areas on the disk portion of the part (does not include airfoils or flowpath) for:
1Nicks, dents, and scratches:
Maximum repairable limit:
Any amount to a maximum depth of 0.005 inch (0.12 mm).
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)
 
2303M52P02  
2311M52G02  
2445M82P01  
2480M12G01  
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 shot)
 
C04-286
Shot, Peening, Cast Steel (AMS 2431/2 ASH), Cast Steel Shot, Regular Hardness (45-52 HRc) (S110 steel shot)
 
C10-010
Abrasive Cloth
 
C10-021
Tape, Plastic
 
C10-205
Almen Test Strips (Type N) (Almen test strips)
C.Referenced Procedures.
 
ATA No.
Description
 
70-21-00
Chemical Cleaning
 
70-21-03
Cleaning Method No. 3 - Steam Cleaning
 
70-24-00
Etching Procedures for Fluorescent-Penetrant Inspection
 
70-24-01
Swab Etching Procedure
 
70-32-00
Indirect Inspection Methods
 
70-32-02
Fluorescent Penetrant Inspection
 
70-32-03
Spot-Fluorescent-Penetrant Inspection
 
70-42-00
Blending and Removal of High Metal Procedures
 
70-47-01
Shotpeening
 
72-31-42
Inspection 001
D.Expendable Parts. None.
E.SPD Information. None.
(1)Locally Manufactured SPD. None.
F.Special Solutions. None.
G.Test Specimens. None.
3 . Dimensional Information.
Subtask 72-31-43-220-063
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 reconvert from millimeters to inches.
NOTE:
Reference dimensions do not require inspection.
4 . Setup Information.
None.
5 . Procedure.
Subtask 72-31-42-110-004
A.Clean the blisk damaged areas. Refer to TASK 70-21-00-110-051 (CHEMICAL CLEANING) and TASK 70-21-03-160-001 (CLEANING METHOD NO. 3 - STEAM CLEANING).
Subtask 72-31-42-220-064
B.Do a visual inspection of the blisk. Refer to TASK 72-31-42-200-801 (72-31-42, INSPECTION 001).
Subtask 72-31-42-350-002
CAUTION:
DO NOT BLEND MORE THAN THE MINIMUM MATERIAL THICKNESS OR CONTOUR DEFINITION. DAMAGE TO THE BLISK CAN OCCUR.
C.Blend the blisk damaged areas. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES), Figure 902, and as follows:
(1)Blending must not be more than the blend depth limits for each feature.
(2)Undercuts, tool marks, gouges, or nicks are not permitted.
(3)Blend and mismatch are permitted in the blisk area AH.
(4)Refer to TASK 72-31-42-200-801 (72-31-42, INSPECTION 001), for blending limits.
Subtask 72-31-42-110-005
D.Clean the blisk repaired areas. Refer to TASK 70-21-00-110-051 (CHEMICAL CLEANING) and TASK 70-21-03-160-001 (CLEANING METHOD NO. 3 - STEAM CLEANING).
Subtask 72-31-42-110-006
E.Etch the blisk repaired areas. Refer to TASK 70-24-00-110-033 (ETCHING PROCEDURES FOR FLUORESCENT-PENETRANT INSPECTION) , TASK 70-24-01-110-034 (SWAB ETCHING PROCEDURE) , and as follows:
(1)Use Class B etchant.
Subtask 72-31-42-230-004
F.Alternative Procedure Available. Do an inspection of the blisk repaired areas. Refer to TASK 70-32-00-200-002 (INDIRECT INSPECTION METHODS), TASK 70-32-02-230-001 (FLUORESCENT PENETRANT INSPECTION), and as follows:
(1)Use Class G penetrant.
(2)Indications more than 0.015 inch (0.39 mm) are not permitted.
(3)Linear indications are not permitted.
NOTE:
Linear indications are indications that are at least three times longer that they are wide.
Subtask 72-31-42-230-005
F.A.Alternative Procedure. Do an inspection of the blisk repaired areas. Refer to TASK 70-32-00-200-002 (INDIRECT INSPECTION METHODS), TASK 70-32-03-230-002 (SPOT-FLUORESCENT-PENETRANT INSPECTION), and as follows:
(1)Use Class G penetrant.
(2)Indications more than 0.015 inch (0.39 mm) are not permitted.
(3)Linear indications are not permitted.
NOTE:
Linear indications are indications that are at least three times longer that they are wide.
Subtask 72-31-42-350-003
WARNING:
REFER TO THE PRODUCT LABEL AND THE MANUFACTURER’S (MATERIAL) SAFETY DATA SHEET FOR INSTRUCTIONS ON THE HAZARDS, STORAGE, SAFE HANDLING AND PROPER USE OF THIS PRODUCT.
G.Polish the blisk repaired areas to remove the effects of the swab etching procedure as follows:
(1)Use C10-010  abrasive cloth.
Subtask 72-31-42-380-002
H.Peen the blisk repaired areas. Refer to TASK 70-47-01-380-016 (SHOTPEENING), Figure 903, and as follows:
(1)Apply a mask with C10-021  plastic tape to all the blisk airfoils and fillet radius areas that you will not peen, area BA, airfoils, and airfoil to platform fillet radii.
(2)Use C04-166  CCW14 shot or C04-286  S110 steel shot.
(3)Peen the blisk to an intensity of 0.006-0.011N, area BB, flowpath area BE, in area AB only, and as follows:
(a)Overspray is not permitted in area BA, airfoils, and airfoil to platform fillet radii.
(4)Ricochet peening is permitted in blisk area BC, area BD, and area BE.
(5)Coverage must be a minimum of 100 percent.
(6)Do an inspection of the intensity in all the blisk repaired areas as follows:
(a)Use C10-205  Almen test strips and an Almen test strip holder.
(7)Remove all the mask from the blisk.
Subtask 72-31-42-110-007
I.Clean the blisk repaired areas. Refer to TASK 70-21-00-110-051 (CHEMICAL CLEANING) and TASK 70-21-03-160-001 (CLEANING METHOD NO. 3 - STEAM CLEANING).
Subtask 72-31-42-220-065
J.Do a final inspection of the blisk. Refer to TASK 72-31-42-200-801 (72-31-42, INSPECTION 001).
* * * FOR ALL
Figure 901   High Pressure Compressor Stage 2 Blisk
* * * FOR ALL
Figure 902   (Sheet 1 ) Blending
* * * FOR ALL
Figure 902   (Sheet 2 ) Blending
* * * FOR ALL
Figure 903   Shotpeening