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TASK 72-51-01-300-801
1 . Repair for the High Pressure Turbine Stage 1 Nozzle Support.
A.This procedure gives instructions to repair the high pressure turbine stage 1 nozzle support (nozzle support) by replacing damaged or missing self-locking shank nuts (shank nuts). Refer to Figure 901 and Figure 902.
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 72-51-01, Inspection 001. Refer to TASK 72-51-01-200-801 (72-51-01, INSPECTION 001) .
(4)Visual Inspection.
(c)Do an inspection of the forward flange, combustor flange interface, and aft inner flange for:
5Loose or missing shank nuts:
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)
 
2303M22G03  
2303M22G04  
2303M22G05  
2303M22G06  
 
2303M22G08  
2303M22G09  
2303M22G10  
2407M46G02  
 
2407M46G04  
2407M46G06  
2407M46G08  
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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
 
C04-035
Solvent, General (isopropyl alcohol)
 
C10-182
Cloth, Cleaning for Aircraft Structural (SAE-AMS 3819, BMS 15-5) (lint free cloth)
C.Referenced Procedures.
 
ATA No.
Description
 
70-00-03
Machining Data
 
70-31-02
Acceptability Limits for Fluorescent Penetrant Inspection
 
70-32-00
Indirect Inspection Methods
 
70-32-03
Spot-Fluorescent-Penetrant Inspection
 
70-32-11
White Light Inspection
 
70-48-00
Threaded Inserts
 
70-48-13
Shank Nut Repair
 
72-51-01
Inspection 001
 
72-51-01
Cleaning 001
D.Expendable Parts. None.
E.SPD Information.
 
CSN
Description
 
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Self-Locking Shank Nut (9114M97P19   ) (spare shank nut)
F.Special Solutions. None.
G.Test Specimens. None.
3 . Dimensional Information.
Subtask 72-51-01-220-042
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.
Subtask 72-51-01-350-001
A.Set-up the nozzle support for machining as follows:
(1)Put the nozzle support forward end down on a machine table.
(2)Attach the nozzle support forward flange to the machine table with clamps as follows:
(a)Keep surface A flat to 0.002 inch (0.05 mm) or better.
(3)Put the machine spindle directly above the center of the nozzle support shank nut hole that you will repair and do as follows:
(a)Lock the machine spindle in place.
5 . Procedure.
Subtask 72-51-01-160-001
A.Clean the nozzle support. Refer to TASK 72-51-01-100-801 (72-51-01, CLEANING 001).
Subtask 72-51-01-350-002
B.Remove the damaged shank nut(s) from the nozzle support as follows:
(1)Set-up the nozzle support for machining. Refer to Substak 72-51-01-350-001 (paragraph 4.A., Setup Information).
Subtask 72-51-01-320-001
(2)Machine the shank nut(s). Refer to TASK 70-00-03-800-004 (MACHINING DATA) and as follows:
CAUTION:
DO NOT INCREASE THE DIAMETER OF THE NOZZLE SUPPORT SHANK NUT HOLE DURING THE SHANK NUT REMOVAL PROCEDURE. DAMAGE TO THE PART WILL OCCUR.
(a)Drill a hole at the flared end of the nozzle support shank nut as follows:
NOTE:
This procedure will decrease the wall thickness of the shank nut material at the flared end of the shank nut.
1Drill the hole to a diameter of 0.308 inch (7.82 mm) or less.
2Drill the hole to a depth of 0.120-0.140 inch (3.05-3.55 mm).
Subtask 72-51-01-350-003
CAUTION:
DO NOT DAMAGE THE NOZZLE SUPPORT DURING THE SHANK NUT REMOVAL PROCEDURE. DAMAGE TO THE PART WILL OCCUR.
(b)If necessary, use a tapered punch and a mallet to release the shank nut from the nozzle support.
(c)Remove the shank nut from the nozzle support.
(d)Discard all of the shank nuts that you remove.
Subtask 72-51-01-110-008
C.If necessary, clean the nozzle support. Refer to TASK 72-51-01-100-801 (72-51-01, CLEANING 001) and as follows:
NOTE:
Parts must be cleaned to remove all indications of oil, grease, carbon, and rust scale before the penetrant is applied.
WARNING:
ISOPROPYL ALCOHOL IS TOXIC AND FLAMMABLE. USE PERSONAL PROTECTION EQUIPMENT. USE IN A WELL VENTILATED AREA.
(1)Use a clean C10-182   lint free cloth moist with C04-035   isopropyl alcohol to clean the local repair areas that you will examine.
Subtask 72-51-01-230-003
D.Do an inspection of the nozzle support. 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 C penetrant.
(2)Examine the nozzle support shank nut holes that do not have a shank nut installed and the surfaces adjacent to the nozzle support shank nut holes.
(3)Refer to TASK 70-31-02-220-003 (ACCEPTABILITY LIMITS FOR FLUORESCENT PENETRANT INSPECTION) and as follows:
(a)Use Class A limits.
Subtask 72-51-01-220-043
E.Do an inspection of the nozzle support shank nut holes. Refer to Figure 901, Figure 902, and as follows:
(1)Do a dimensional inspection of the nozzle support shank nut holes that do not have a shank nut installed.
NOTE:
If the nozzle support shank nut hole is larger than the maximum finish dimensions, the nozzle support cannot be repaired by this procedure.
Subtask 72-51-01-350-004
F.Install the spare shank nut(s), 9114M97P19   , on the nozzle support. Refer to TASK 70-48-00-350-015 (THREADED INSERTS), TASK 70-48-13-350-024 (SHANK NUT REPAIR), Figure 901, and as follows:
(1)Make sure that the spare shank nut is correctly attached to the nozzle support as follows:
(a)The installed shank nut lug must be flush with the forward surface of the nozzle support aft inner flange as follows:
1Flare the spare shank nut until the axial movement is 0.005 inch (0.12 mm) or less.
2Use a shim that is 0.005 inch (0.12 mm) or less in thickness to do a check of the axial movement.
3The fit of the shim between the nozzle support aft inner flange and the shank nut lug is permitted to be tight.
Subtask 72-51-01-220-044
(2)Do an inspection of the installed spare shank nut(s). Refer to TASK 70-32-00-200-002 (INDIRECT INSPECTION METHODS), TASK 70-32-11-220-011 (WHITE LIGHT INSPECTION) , and as follows:
(a)Make sure there are no linear indications in the shank of the installed shank nut(s).
NOTE:
Linear indications are indications that are at least four times longer than they are wide.
(b)Use 10x magnification.
(c)If you find linear indications in the shank of the shank nut, do as follows:
1Do Subtask 72-51-01-350-002 (paragraph 5.B.) thru Subtask 72-51-01-350-004 (paragraph 5.F.) again until the shank nut holes and the installed shank nuts agree with the limits.
Subtask 72-51-01-350-005
G.Deleted.
Subtask 72-51-01-160-002
H.Clean the nozzle support. Refer to TASK 72-51-01-100-801 (72-51-01, CLEANING 001).
Subtask 72-51-01-200-001
I.Do an inspection of the nozzle support. Refer to TASK 72-51-01-200-801 (72-51-01, INSPECTION 001).
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Figure 901   (Sheet 1 ) High Pressure Turbine Stage 1 Nozzle Support
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Figure 901   (Sheet 2 ) High Pressure Turbine Stage 1 Nozzle Support
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Figure 902   (Sheet 1 ) High Pressure Turbine Stage 1 Nozzle Support - Dimensional Information
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Figure 902   (Sheet 2 ) High Pressure Turbine Stage 1 Nozzle Support - Dimensional Information