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TASK 72-22-41-300-802
1 . General Blend Repair of the Booster Spool Stage 2-5.
A.This procedure gives instructions to repair the booster spool by blending the stage 2-5. 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.
(4)Visual Inspection.
(a)Do an inspection of all areas (does not include boltholes, dovetails slot, dovetail areas, dovetail load and lock slots, flanges, and seal teeth) for:
2Nicks, dents, and scratches:
Maximum repairable limit:
Any amount, 0.010 inch (0.25 mm) in depth, after removal of high metal and blending to a minimum of 0.25 inch (6.4 mm) in radius.
(b)Do an inspection of the dovetail slots for:
3Nicks, dents, and scratches on bottom of dovetails (area AB):
NOTE:
Area CD is a repair area that is part of area AB. Blend repair is only permitted in area CD.
Maximum repairable limit:
Any amount, in area CD only, 0.010 inch (0.25 mm) in depth, after removal of high metal and blending to a minimum of 0.25 inch (6.4 mm) in radius.
(c)Do an inspection of the dovetails areas for:
1Wear, nicks, dents, and scratches:
Maximum repairable limit:
Any amount, 0.010 inch (0.25 mm) in depth, after removal of high metal and blending to a minimum of 0.07 inch (1.8 mm) in radius.
Limitations:
•
Blending is not permitted in a distance of 0.25 inch (6.4 mm) from load and lock slot.
•
Maximum blend depth 0.003 inch (0.07 mm) at stage 2 forward and aft thrust areas plus or minus 4 degrees from center of load slot.
(d)Do an inspection of seal teeth for:
2Rub marks, nicks, dents, and scratches at the seal teeth diameter (tips):
Maximum repairable limit:
Any amount, 0.006 inch (0.15 mm) in depth, after removal of high metal with a length of 0.050 inch (1.27 mm). Minimum blend radius 0.25 inch (6.4 mm). Maximum cumulative circumferential length of each given tooth limited to 10 percent of circumference.
7Rub marks, nicks, dents, and scratches at sides of seal teeth:
Maximum repairable limit:
Any amount, 0.002 inch (0.05 mm) in depth, after removal of high metal and blending to a minimum of 0.25 inch (6.4 mm) in radius.
(f)Do an inspection of the spacer flange for:
3Nicks, dents, and scratches:
Maximum repairable limit:
Any amount, 0.010 inch (0.25 mm) in depth, after removal of high metal and blending to a minimum of 0.04 inch (1.1 mm) in radius. Blend cannot be in 0.25 inch (6.4 mm) from bolthole edges.
(g)Do an inspection of the forward flange for:
2Nicks, dents, and scratches:
Maximum repairable limit:
Any amount, 0.010 inch (0.25 mm) in depth, after removal of high metal and blending to a minimum of 0.26 inch (6.7 mm) in radius. Blend cannot be within 0.25 inch (6.4 mm) from bolthole edges.
3Nicks, dents, and scratches at rabbet area:
Maximum repairable limit:
Any amount, 0.004 inch (0.10 mm) in depth, after removal of damage and blending to a minimum of 0.052 inch (1.33 mm) in radius.
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)
 
10039815  
10079460  
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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
 
C04-166
Shot, Peening, Conditioned Cut Wire (CCW14 shot)
 
C10-010
Abrasive Cloth
 
C10-205
Almen Test Strips (type N Almen 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
 
72-22-41
Inspection 001
 
72-22-41
Repair 001
D.Expendable Parts. None.
E.SPD Information.
(1)Locally Manufactured SPD. None.
F.Special Solutions. None.
G.Test Specimens. None.
3 . Dimensional Information.
Subtask 72-22-41-220-065
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 72-22-41-350-008
A.If necessary, remove the shank nut from the booster spool. Refer to TASK 72-22-41-300-801 (72-22-41, REPAIR 001).
Subtask 72-22-41-350-009
CAUTION:
REMOVE ONLY THE MINIMUM QUANTITY OF MATERIAL NECESSARY OR DAMAGE TO THE BOOSTER SPOOL CAN OCCUR.
B.Blend the booster spool. Refer to TASK 70-42-00-350-002 (BLENDING AND REMOVAL OF HIGH METAL PROCEDURES), Figure 901, and as follows:
(1)The damage must be completely removed. The blend depth must be a minimum of 1.25 times the depth of the damage.
(2)Remove the minimum quantity of material during the blending process. Do not blend more than the maximum depth or less than the minimum blend radius.
(3)Break all edges to 0.010-0.020 inch (0.25-0.50 mm).
Subtask 72-22-41-160-002
C.Clean the repair areas of the booster spool. Refer to TASK 70-21-00-110-051 (CHEMICAL CLEANING) and TASK 70-21-03-160-001 (CLEANING METHOD NO. 3 - STEAM CLEANING).
Subtask 72-22-41-110-007
D.Etch the repair areas of the booster spool. 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 72-22-41-230-004
E.Alternative Procedure Available. Do an inspection of the repair areas of the booster spool. 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 (0.38 mm) are not permitted.
(3)Indications that go across corners or in fillets are not permitted.
(4)Linear indications are not permitted.
NOTE:
Linear indications are indications that are at least three times longer that they are wide.
Subtask 72-22-41-230-005
E.A.Alternative Procedure. Do an inspection of the repair areas of the booster spool. 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 (0.38 mm) are not permitted.
(3)Indications that go across corners or in fillets are not permitted.
(4)Linear indications are not permitted.
NOTE:
Linear indications are indications that are at least three times longer that they are wide.
Subtask 72-22-41-350-010
WARNING:
USE EYE PROTECTION WHEN YOU POLISH MATERIAL OR PARTS. THE PARTICLES CAN CAUSE AN INJURY TO YOUR EYES. USE IN A WELL-VENTILATED AREA.
F.Polish the repair area of the booster spool to remove the effects of the swab etching procedure as follows:
(1)Use C10-010  abrasive cloth.
Subtask 72-22-41-380-001
WARNING:
DO NOT BREATHE PARTICLES FROM SHOT PEENING OR LET PARTICLES TOUCH YOU. THE PARTICLES CAN CAUSE DAMAGE, INJURY, OR IRRITATION TO YOU. USE PERSONAL PROTECTION EQUIPMENT. USE LOCAL MECHANICAL EXHAUST VENTILATION OR AN APPROVED RESPIRATOR.
G.Peen the repair areas of the booster spool. Refer to TASK 70-47-01-380-016 (SHOTPEENING) and as follows:
(1)Use C04-166  CCW14 shot.
(2)Use C10-205  type N Almen strips.
(3)Peen the booster spool to an intensity of 0.006-0.012N.
(4)Intensity verification is necessary at all repaired locations.
(a)Make sure that you do the intensity verification with a simulative fixture.
(5)Coverage must be a minimum of 100 percent, except on seal teeth. Overspray on seal teeth is permitted, but not required.
(6)Perform visual inspection of all edges to assure that no burrs or rollover of edges has occurred after peening.
Subtask 72-22-41-160-003
H.Clean the repair areas of the booster spool. Refer to TASK 70-21-00-110-051 (CHEMICAL CLEANING) and TASK 70-21-03-160-001 (CLEANING METHOD NO. 3 - STEAM CLEANING).
Subtask 72-22-41-350-011
I.If necessary, replace the shank nut. Refer to TASK 72-22-41-300-801 (72-22-41, REPAIR 001).
Subtask 72-22-41-220-066
J.Do a final visual inspection of the booster spool blended areas. Refer to TASK 72-22-41-200-805 (72-22-41, INSPECTION 001).
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Figure 901   (Sheet 1 ) Booster Spool Stage 2-5
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Figure 901   (Sheet 2 ) Booster Spool Stage 2-5
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Figure 901   (Sheet 3 ) Booster Spool Stage 2-5
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Figure 901   (Sheet 4 ) Booster Spool Stage 2-5
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Figure 901   (Sheet 5 ) Booster Spool Stage 2-5
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Figure 901   (Sheet 6 ) Booster Spool Stage 2-5