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TASK 72-32-01-300-801
1 . Repair for the High Pressure Compressor Stator Forward Case Assembly.
A.This procedure gives instructions to repair the high pressure compressor (HPC) stator forward case assembly by removal and replacement of damage or worn variable stator vane (VSV) bushings. 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 72-32-01, Inspection 001. Refer to TASK 72-32-01-200-801 (72-32-01, INSPECTION 001) .
(4)Visual Inspection.
(f)Do an inspection stage 1 VSV bore area and stage 2-4 bushing areas for:
2Nicks and scratches on the mating surfaces:
Maximum repairable limit:
Any amount on the stage 2-4 bushings.
3Wear or damage on the ID of the counter bores:
Maximum repairable limit:
Any amount on the stage 2-4 bushings.
4Wear in the bore:
Maximum repairable limit:
Any amount on the stage 2-4 bushings.
(6)Special Dimensional Inspection:
(a)Do a dimensional inspection as follows:
7Stage 2 bushing diameters:
Maximum repairable limit:
Any amount on the stage 2 bushings.
8Stage 3 and 4 bushing diameters:
Maximum repairable limit:
Any amount on the stage 3 and 4 bushings.
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)
 
2302M67G05  
2302M67G06  
2302M67G07  
2302M67G11  
 
2644M01G01  
2514M80G01  
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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.
 
Tool No.
Description
 
11C3300
Stages 2-4 High Pressure Compressor Stator Bushing Installation Tool Set
 
11C3314
Stages 2-4 High Pressure Compressor Stator Bushing Puller Kit
(2)Standard Tools and Equipment. None.
(3)Locally Manufactured Tools. None.
B.Consumable Materials.
 
Code No.
Description
 
C02-033
Petrolatum, Soft (Fed Spec. VV-P-236) (petrolatum)
 
C04-003
Solvent, General (acetone)
 
C04-035
Solvent, General (isopropyl alcohol)
 
C10-182
Cloth, Cleaning For Aircraft Structural (SAE-AMS 3819, BMS 15-5) (cleaning cloth)
C.Referenced Procedures.
 
ATA No.
Description
 
70-21-00
Chemical Cleaning
 
70-21-23
Cleaning Method 23- Hand-Wipe Degreasing
 
72-32-01
Inspection 001
D.Expendable Parts. None.
E.SPD Information.
 
CSN
Description
 
2322M52P01
Outer Bushing
 
2322M52P02
Outer Bushing
 
2322M52P03
Outer Bushing
 
2322M52P05
Outer Bushing
 
2322M52P06
Outer Bushing
 
2322M52P07
Outer Bushing
 
2322M53P01
Inner Bushing
 
2322M53P02
Inner Bushing
 
2322M53P03
Inner Bushing
 
2322M53P05
Inner Bushing
 
2322M53P06
Inner Bushing
 
2322M53P07
Inner Bushing
 
2322M54P01
Bushing Seal
 
2322M54P03
Bushing Seal
 
2311M55P01
Inner Bushing
 
2311M55P02
Inner Bushing
 
2311M55P03
Inner Bushing
 
2322M52P09
Outer Bushing
 
2322M52P10
Outer Bushing
 
2322M52P11
Outer Bushing
 
2322M52P13
Outer Bushing
 
2322M52P14
Outer Bushing
 
2322M52P15
Outer Bushing
 
2322M53P09
Inner Bushing
 
2322M53P10
Inner Bushing
 
2322M53P11
Inner Bushing
 
2322M53P13
Inner Bushing
 
2322M53P14
Inner Bushing
 
2322M53P15
Inner Bushing
 
2311M55P05
Inner Bushing
 
2311M55P06
Inner Bushing
 
2311M55P07
Inner Bushing
F.Special Solutions. None.
G.Test Specimens. None.
3 . Dimensional Information.
Subtask 72-32-01-220-054
A.Refer to Figure 904 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 72-32-01-350-001
A.If necessary, remove the damaged inner and outer bushings from the VSV bores as follows:
(1)Use the 11C3314   bushing puller. Refer to Figure 902.
(2)If non-damaged bushings were removed, check the serviceability of the bushings. Refer to Figure 901, Figure 905, Figure 906, Figure 907, and do as follows:
(a)Do a dimensional inspection of the bushings as follows:
1Make sure that the bushing agrees with the dimensional limits.
(b)Do a visual inspection of the bushings as follows:
1Make sure that there is no wear on the bushing.
2Make sure that there is no fretting on the bushing.
3Make sure that there are no nicks or scratches greater than 0.005 inch (0.13 mm), on more than 20 percent of the area.
(c)If serviceable, put in a bag as follows:
1Tag as serviceable.
2Record the stage of the bushing.
(d)If not serviceable, discard the bushing.
Subtask 72-32-01-110-005
B.Clean the VSV bores. Refer to TASK 70-21-00-110-051 (CHEMICAL CLEANING), TASK 70-21-23-110-053 (CLEANING METHOD 23 - HAND-WIPE DEGREASING), and as follows:
WARNING:
ISOPROPYL ALCOHOL IS TOXIC AND FLAMMABLE. USE PERSONAL PROTECTION EQUIPMENT. USE IN A WELL VENTILATED AREA.
WARNING:
ACETONE IS EXPLOSIVE, AN IRRITANT, AN ALLERGEN, AND HAS POISONOUS DETERIORATION. USE VAPOR/FUME CONTROL OR USE A RESPIRATOR.
(2)Use a C10-182  cleaning cloth moistened with C04-003  acetone or C04-035  isopropyl alcohol to clean the repair area.
(3)Replace the dirty cloths with clean cloths until the last moist cloth stays clean.
Subtask 72-32-01-350-002
C.Install the inner and outer bushings in the VSV bores. Refer to Figure 904 and do as follows:
(1)Measure the VSV bore diameter.
(2)Get the correct bushing for the VSV bore. Refer to Figure 904.
(3)Get the correct new or serviceable bushing seal as follows:
(a)For stage 2, use bushing seal part number 2322M54P03   when any of the following bushing part numbers are installed:
1Outer bushing part numbers 2322M52P05   , 2322M52P06   , and 2322M52P07   .
2Inner bushing part numbers 2311M55P01   , 2311M55P02   , and 2311M55P03   .
(b)For stage 3 and stage 4, use bushing seal part number 2322M54P01   when any of the following bushing part numbers are installed:
1Outer bushing part numbers 2322M52P01   , 2322M52P02   , and 2322M52P03   .
2Inner bushing part numbers 2322M53P01   , 2322M53P02   , 2322M53P03   , 2322M53P05   , 2322M53P06   , and 2322M53P07   .
NOTE:
Bushing seals are not used when outer bushing part numbers 2322M52P09   , 2322M52P10   , 2322M52P11   , 2322M52P13   , 2322M52P14   , 2322M52P15   and inner bushing part numbers 2322M53P09   , 2322M53P10   , 2322M53P11   , 2322M53P13   , 2322M53P14   , 2322M53P15   , 2311M55P05   , 2311M55P06   , and 2311M55P07   are installed together.
(4)Use the 11C3300   bushing installation tool. Refer to Figure 903.
(5)Apply C02-033  petrolatum to the outside diameter (OD) rabbet of bushings before installing the bushing.
(6)Make sure that each bushing is fully installed.
Subtask 72-32-01-220-055
D.Do a visual inspection of the installed bushing as follows:
(1)Use 2X magnification and white light.
(2)Missing coating is not permitted.
(3)Linear indications in the coating are not permitted.
NOTE:
Linear indications are indications that are at least four times longer than they are wide.
(4)Indications less than 0.03 inch (0.7 mm) are not interpretable.
Subtask 72-32-01-220-056
E.Do a dimensional inspection of the bushing installation. Refer to Figure 904.
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Figure 901   (Sheet 1 ) HPC Forward Case Assembly
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Figure 901   (Sheet 2 ) HPC Forward Case Assembly
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Figure 902   (Sheet 1 ) Bushing Removal
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Figure 902   (Sheet 2 ) Bushing Removal
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Figure 903   Bushing Installation
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Figure 904   (Sheet 1 ) Bushing Inspection
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Figure 904   (Sheet 2 ) Bushing Inspection
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Figure 905   Outer Bushing - Serviceability Check
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Figure 906   Bushing Seal - Serviceability Check
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Figure 907   (Sheet 1 ) Inner Bushing - Serviceability Check
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Figure 907   (Sheet 2 ) Inner Bushing - Serviceability Check