W DOC AIRBUS | AMM A320F

Replacement of the High Pressure Compressor (HPC) Case Borescope Plug Lock [PW11]

TASK 72-35-01-920-803-A
Replacement of the High Pressure Compressor (HPC) Case Borescope Plug Lock

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.
WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
CAUTION: THIS AMM REPAIR LETS YOU REPLACE ONLY THE ORIGINAL EQUIPMENT MANUFACTURER'S BORESCOPE PLUG LOCKS. IF THE HOLES ARE DAMAGED AND OVERSIZED PLUG LOCKS ARE NECESSARY, YOU MUST NOT DO THE REPAIR ON THE AIRCRAFT. YOU MUST REMOVE THE PART AND REFER TO THE RELATED CLEANING, INSPECTION AND REPAIR MANUAL FOR INSTRUCTIONS.
CAUTION: MAKE SURE THAT DURING THE REPAIR, PARTS AND DEBRIS DO NOT GO INTO THE ENGINE. IF THEY DO, DAMAGE TO THE ENGINE WILL OCCUR.
ZONE: 400
1. Reason for the Job
Use this procedure to repair loose or damaged borescope plug lock(s) on the High Pressure Compressor (HPC) front case set.
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
1
ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific
1
WRENCH - STANDARD
PWA115141
1
PUSHER, INSTALLATION
PWA115422
1
PUSHER, INSTALLATION - HPC
PWA212003
1
BORESCOPE PLUG PUSHER
PWA212004
1
BORESCOPE LOCK PUSHER
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.P03-001)
lubricant, aircraft turbine engine
 C. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
400
POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR, 461AL, 462AR
 D. Expendable Parts
FIG.ITEM
DESIGNATION
IPC-CSN
1
BORESCOPE PLUG LOCK(S)
EIPC 72-35-10-01-120
2
BORESCOPE PLUG LOCK(S)
EIPC 72-35-10-01-130
 E. Referenced Information
REFERENCE
DESIGNATION
TASK 70-27-00-910-804-A
SPOP 208 - Degreasing of Parts by Solvent Wiping
TASK 71-00-00-860-833-A
Procedure to Prevent Engine Motoring
TASK 71-13-00-010-802-A
Opening of the Fan Cowl Doors
TASK 71-13-00-410-802-A
Closing of the Fan Cowl Doors
TASK 78-30-00-040-805-A
Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-805-A
Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-36-00-010-802-A
Opening of the Thrust Reverser Cowl-Doors
TASK 78-36-00-410-802-A
Closing of the Thrust Reverser Cowl-Doors
F High Pressure Compressor (HPC) Case Borescope Plug Lock - Removal and Inspection
F High Pressure Compressor (HPC) Case Borescope Plug Lock - Installation (PRE SB C-72-00-0098A)
F High Pressure Compressor (HPC) Case Borescope Plug Lock - Installation (POST SB C-72-00-0098A)
3. Job Set-up
Subtask 72-35-01-941-052-A ** ON A/C NOT FOR ALL
A. Safety Precautions
   (1) Do the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).
Subtask 72-35-01-010-052-A ** ON A/C NOT FOR ALL
B. Get Access
   (1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-802):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR.
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR.
   (2) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
Subtask 72-35-01-040-051-A ** ON A/C NOT FOR ALL
C. Deactivation of the Thrust Reverser for Ground Maintenance
WARNING: YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.
   (1) Do the deactivation of the thrust reverser system for ground maintenance (Ref. AMM TASK 78-30-00-040-805).
Subtask 72-35-01-010-053-A ** ON A/C NOT FOR ALL
D. Get Access
   (1) Open the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-010-802):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL, 452AR.
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL, 462AR.
4. Procedure
CAUTION: WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.
Subtask 72-35-01-920-051-A ** ON A/C NOT FOR ALL
A. Replacement of the High Pressure Compressor (HPC) Case Borescope Plug Lock
F High Pressure Compressor (HPC) Case Borescope Plug Lock - Removal and Inspection ** ON A/C NOT FOR ALL
   (1) Remove all the external attachments that are necessary to aid in the removal and installation of the borescope plug lock(s).
   (2) Remove the loose or damaged borescope plug lock(s) (1) from the HPC front case set:
CAUTION: BE CAREFUL WHEN USE TOOLS TO REMOVE THE LOCK(S). IF YOU ARE NOT CAREFUL, YOU CAN CAUSE DAMAGE TO THE HPC.
     (a) Remove the loose or damaged borescope plug lock(s) (1) with a small pry bar.
   (3) Remove the loose or damaged borescope plug lock(s) (2) from the HPC front case set:
CAUTION: BE CAREFUL WHEN USE TOOLS TO REMOVE THE LOCK(S). IF YOU ARE NOT CAREFUL, YOU CAN CAUSE DAMAGE TO THE HPC.
     (a) Remove the loose or damaged borescope plug lock(s) (2) with a small pry bar.
   (4) Clean the repair area(s) with SPOP 208 (Ref. AMM TASK 70-27-00-910-804).
   (5) Do a visual and dimensional inspection of the borescope plug lock counterbore and boss face as follows:
     (a) Counterbore diameter for the borescope plug lock(s) (1) must be between 0.475 in. (12.06 mm) and 0.477 in. (12.12 mm) prior to installation.
     (b) Counterbore and boss face must not have nicks, burrs, scratches, tool marks, corrosion, wear or damage.
     (c) Counterbore diameter for the borescope plug lock(s) (2) must be between 0.587 in. (14.91 mm) and 0.589 in. (14.96 mm) prior to installation.
     (d) Counterbore and boss face must not have nicks, burrs, scratches, tool marks, corrosion, wear or damage.

PRE SB C-72-00-0098A (Config-1 Initial Assembly Process)

   (6) Install new 72351001-120BORESCOPE PLUG LOCK(S)1 to the AP HPC-2, AP-HPC-3 and AP HPC-4 borescope ports as follows:
F High Pressure Compressor (HPC) Case Borescope Plug Lock - Installation (PRE SB C-72-00-0098A) ** ON A/C NOT FOR ALL
NOTE: The assembly operation is done at room temperature with hand tools only. The borescope plug lock does not need to be cooled for installation.
NOTE: The borescope plug locks must be flush to 0.005 in. (0.13 mm) below surface.
     (a) Install the borescope plug lock(s) (1) with the PWA115422 PUSHER, INSTALLATION - HPC to the HPC front case set as follows:
       1 Apply P03-001lubricant, aircraft turbine engine to the threads and shoulder of the PWA115422 PUSHER, INSTALLATION - HPC.
       2 Install the borescope plug lock to the PWA115422 PUSHER, INSTALLATION - HPC.
       3 Insert the PWA115422 PUSHER, INSTALLATION - HPC with the borescope plug lock into the counterbore.
       4 Tighten the PWA115422 PUSHER, INSTALLATION - HPC with a WRENCH - STANDARD to install the borescope plug lock into the counterbore.
       5 Remove the PWA115422 PUSHER, INSTALLATION - HPC.
       6 Examine the borescope plug lock(s) (1).
   (7) Install new 72351001-130BORESCOPE PLUG LOCK(S)2 to the AP HPC-5 and AP HPC-6 borescope ports as follows:
F High Pressure Compressor (HPC) Case Borescope Plug Lock - Installation (PRE SB C-72-00-0098A) ** ON A/C NOT FOR ALL
NOTE: The assembly operation is done at room temperature with hand tools only. The borescope plug locking insert does not need to be decreased in temperature for installation.
NOTE: The borescope plug locks must be flush to 0.005 in. (0.13 mm) below surface.
     (a) Install borescope plug lock(s) (2) with the PWA115141 PUSHER, INSTALLATION tool to the HPC front case set as follows:
       1 Apply P03-001lubricant, aircraft turbine engine to the threads and shoulder of the PWA115141 PUSHER, INSTALLATION.
       2 Install the borescope plug lock to the PWA115141 PUSHER, INSTALLATION.
       3 Insert the PWA115141 PUSHER, INSTALLATION with the borescope plug lock into the counterbore.
       4 Tighten the PWA115141 PUSHER, INSTALLATION with a WRENCH - STANDARD to press the borescope plug lock into the counterbore.
       5 Remove the PWA115141 PUSHER, INSTALLATION.
       6 Examine the borescope plug lock(s) (2).

END OF PRE SB C-72-00-0098A (Config-1 Initial Assembly Process)

POST SB C-72-00-0098A (Config-2 Improved Assembly Process)

   (8) Install new 72351001-120BORESCOPE PLUG LOCK(S)1 to the AP HPC-2, AP HPC-3 and AP HPC-4 borescope ports as follows:
F High Pressure Compressor (HPC) Case Borescope Plug Lock - Installation (POST SB C-72-00-0098A) ** ON A/C NOT FOR ALL
NOTE: The assembly operation is done at room temperature with hand tools only. The borescope plug lock does not need to be cooled for installation.
NOTE: The borescope plug lock must be flush to the surface.
     (a) Install the borescope plug lock(s) (1) with the PUSHER, INSTALLATION PWA212004 BORESCOPE LOCK PUSHER to the HPC front case set as follows:
       1 Install the borescope plug lock to the PUSHER, INSTALLATION PWA212004 BORESCOPE LOCK PUSHER.
       2 Insert the PUSHER, INSTALLATION PWA212004 BORESCOPE LOCK PUSHER with the borescope plug lock into the counterbore.
       3 Tighten the PUSHER, INSTALLATION PWA212004 BORESCOPE LOCK PUSHER with a WRENCH - STANDARD to install the borescope plug lock into counterbore.
       4 Remove the PUSHER, INSTALLATION PWA212004 BORESCOPE LOCK PUSHER.
       5 Examine the borescope plug lock(s) (1).
   (9) Install new 72351001-130BORESCOPE PLUG LOCK(S)2 to the AP HPC-5 and AP HPC-6 borescope ports as follows:
F High Pressure Compressor (HPC) Case Borescope Plug Lock - Installation (POST SB C-72-00-0098A) ** ON A/C NOT FOR ALL
NOTE: The assembly operation is done at room temperature with hand tools only. The borescope plug locking insert does not need to be decreased in temperature for installation.
NOTE: The borescope plug locks must be flush to the surface.
     (a) Install borescope plug lock(s) (2) with the PUSHER, INSTALLATION PWA212003 BORESCOPE PLUG PUSHER to the HPC front case set as follows:
       1 Install the borescope plug lock to the PUSHER, INSTALLATION PWA212003 BORESCOPE PLUG PUSHER.
       2 Install the PUSHER, INSTALLATION PWA212003 BORESCOPE PLUG PUSHER with the borescope plug lock in the counterbore.
       3 Tighten the PUSHER, INSTALLATION PWA212003 BORESCOPE PLUG PUSHER with a WRENCH - STANDARD to press the borescope plug lock into the counterbore.
       4 Remove the PUSHER, INSTALLATION PWA212003 BORESCOPE PLUG PUSHER.
       5 Examine the borescope plug lock(s) (2).

END OF POST SB C-72-00-0098A (Config-2 Improved Assembly Process)

   (10) Examine the assembly for foreign objects, damage and correct assembly.
5. Close-up
Subtask 72-35-01-410-052-A ** ON A/C NOT FOR ALL
A. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Close the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-410-802):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL, 452AR.
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL, 462AR.
Subtask 72-35-01-440-051-A ** ON A/C NOT FOR ALL
B. Do the reactivation of the thrust reverser system after ground maintenance (Ref. AMM TASK 78-30-00-440-805).
Subtask 72-35-01-410-053-A ** ON A/C NOT FOR ALL
C. Close Access
   (1) Remove the access platform(s).
   (2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR.
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR.
   (3) Remove the WARNING NOTICE(S).
[Rev.10 from 2021] 2026.04.01 13:03:05 UTC
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