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TASK 72-22-40-300-801
1 . Repair for the Stage 1 Fan Disk.
A.This procedure gives instructions to repair the stage 1 fan disk by blending the disk post forward face and chamfer (area F) to remove the damaged areas. 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.
NOTE:
For 72-22-40, Inspection 001. Refer to TASK 72-22-40-200-801 (72-22-40, INSPECTION 001) .
(4)Visual Inspection.
(a)Do an inspection of all areas of the fan disk for:
8Nicks, dents, and scratches (on the spinner aft support ring flange mating face chamfer (area F)):
Maximum repairable limit:
One defect, up to 0.100 inch (2.54 mm) in depth and 0.250 inch (6.35 mm) in width, and any amount, up to 0.020 inch (0.50 mm) in depth.
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)
 
2300M90G01  
2300M90G02  
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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
 
C04-271
Shot, Peening, Cast Steel (AMS 2431/2 ASH), Cast Steel Shot, High Hardness (55-62 HRc) (S110 cast steel shot)
 
C10-021
Tape, Plastic (masking tape)
 
C10-110
Almen Test Strips
C.Referenced Procedures.
 
ATA No.
Description
 
70-16-00
Marking Practices
 
70-16-05
Metal Stamp Marking
 
70-16-08
Dot Peen Marking for Optical Character Recognition
 
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
 
70-32-03
Spot-Fluorescent-Penetrant Inspection
 
70-42-00
Blending and Removal of High Metal Procedures
 
70-47-01
Shotpeening
 
72-22-40
Cleaning 001
 
72-22-40
Inspection 001
D.Expendable Parts. None.
E.SPD Information. None.
F.Special Solutions. None.
G.Test Specimens. None.
3 . Dimensional Information.
Subtask 72-22-40-220-033
A.Refer to Figure 901 and Figure 902 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.
4 . Setup Information.
None.
5 . Procedure.
Subtask 72-22-40-100-001
A.Clean the fan disk. Refer to TASK 72-22-40-100-801 (72-22-40, CLEANING 001).
Subtask 72-22-40-350-001
B.Blend the fan disk area F to remove the worn/damaged areas. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES), Figure 901, Figure 902, and as follows:
(1)Apply C10-021  masking tape to adjacent surfaces that are not within area F, where blending is not permitted. Refer to Figure 903.
CAUTION:
REMOVAL OF MORE PARENT MATERIAL THAN REQUIRED AND SHARP CHANGES IN THE CONTOUR CAN CAUSE DAMAGE OF THE PART.
(2)Blend the damaged area smooth to adjacent contour and remove as little parent material as possible to meet the required dimensions.
(3)Blend all sharp edges/corners smooth to a minimum radius of 0.030 inch (0.77 mm).
Subtask 72-22-40-110-007
C.Etch the fan disk blended 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 72-22-40-200-001
D.Do an inspection of the fan disk etched 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)Refer to TASK 72-22-40-200-801 (72-22-40, INSPECTION 001) for the acceptance limits.
Subtask 72-22-40-100-002
E.If necessary, clean the fan disk to remove remaining etchant/penetrant. Refer to TASK 70-21-00-110-051 (CHEMICAL CLEANING) and TASK 70-21-03-160-001 (CLEANING METHOD 3 - STEAM CLEANING).
Subtask 72-22-40-380-001
F.Peen the fan disk repaired areas. Refer to TASK 70-47-01-380-016 (SHOTPEENING) and as follows:
(1)Apply C10-021  masking tape to adjacent surfaces that will not be peened.
(2)Use C04-271  S110 cast steel shot.
(3)Use an intensity of 0.004A-0.008A.
(4)Use C10-110  almen test strips and an almen strip holder to verify the intensity at the repaired area.
(5)Overspray is permitted.
Subtask 72-22-40-200-002
G.Do an inspection of the fan disk dovetail slots. Refer to Figure 904 and as follows:
Subtask 72-22-40-350-002
CAUTION:
USE ONLY THE PROCEDURES SPECIFIED. DO NOT USE ALTERNATIVE MARKING PROCEDURES. DAMAGE TO THE PART CAN OCCUR.
(1)Alternative Procedure Available. If the marks “1” or “5” have been damaged during this repair procedure, put a mark on the dovetail slot. Refer to TASK 70-16-00-350-001 (MARKING PRACTICES), TASK 70-16-05-350-020 (METAL STAMP MARKING), and as follows:
(a)If it is not possible to put the mark back at the initial position, put a line through the initial mark and put the new mark adjacent to it.
(b)Make sure that the mark is a minimum of 0.05 inch (1.3 mm) from all edges and radii, and must be of the same height as the initial mark.
Subtask 72-22-40-350-003
(1).A.Alternative Procedure. If the marks “1” or “5” have been damaged during this repair procedure, put a mark on the dovetail slot. Refer to TASK 70-16-00-350-001 (MARKING PRACTICES), TASK 70-16-08-350-001 (DOT PEEN MARKING FOR OPTICAL CHARACTER RECOGNITION), and as follows:
(a)If it is not possible to put the mark back at the initial position, put a line through the initial mark and put the new mark adjacent to it.
(b)Make sure that the mark is a minimum of 0.05 inch (1.3 mm) from all edges and radii, and must be of the same height as the initial mark.
Subtask 72-22-40-350-004
H.Remove all the masking tape.
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Figure 901   Stage 1 Fan Disk
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Figure 902   Stage 1 Fan Disk - Dimensional Information
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Figure 903   Stage 1 Fan Disk - Dimensional Information
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Figure 904   Dovetail Slot Marking Location