Installation of the Borescope Plugs [PW11]

TASK 72-00-00-400-804-A
Installation of the Borescope Plugs

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.

ZONE: 400

1. Reason for the Job
Use this procedure to install the Low Pressure Compressor (LPC), High Pressure Compressor (HPC), diffuser case, High Pressure Turbine (HPT), Turbine Intermediate Case (TIC) and Low Pressure Turbine (LPT) borescope plugs.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 1M(3 FT)
No specific	1	BRUSH - WIRE, STAINLESS STEEL
No specific	1	EXTENSION
No specific	1	SOCKET STANDARD
No specific	Torque wrench: range to between 43 and 36 lbf.in (0.49 and 0.41 m.daN )
No specific	Torque wrench: range to between 60 and 50 lbf.in (0.68 and 0.57 m.daN )
No specific	Torque wrench: range to between 59 and 52 lbf.in (0.67 and 0.59 m.daN )
No specific	Torque wrench: range to between 75 and 68 lbf.in (0.85 and 0.77 m.daN )
No specific	Torque wrench: range to between 120 and 100 lbf.in (1.36 and 1.13 m.daN )
No specific	Torque wrench: range to between 120 and 105 lbf.in (1.36 and 1.19 m.daN )
No specific	Torque wrench: range to between 162 and 148 lbf.in (1.83 and 1.67 m.daN )
No specific	Torque wrench: range to between 200 and 150 lbf.in (2.26 and 1.70 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.P03-001)	lubricant, aircraft turbine engine (synthetic base)
(Material No.P05-005)	wipe, lint-free
(Material No.P06-054)	compound, paste, anti-seize

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. Referenced Information

REFERENCE	DESIGNATION
TASK 70-28-00-910-807-A	SPOP 169 - Application of PWA 36246 (Non-Leaded) Anti-Seize Paste
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 72-21-08-400-801-A	Installation of the Fan Exit Liner Segments
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
Borescope Plugs - LPC Plugs
Borescope Plugs - The HPC Plugs
Borescope Plugs - The Diffuser Case and HPT Plugs
Borescope Plugs - The TIC and LPT Plugs
Borescope Plugs - (Install The Diffuser Case Plug) (Config-2 Case Assembly Durability Improvement Configuration)

3. Job Set-up
Subtask 72-00-00-941-215-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Make sure that you did the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).

Subtask 72-00-00-010-292-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the fan cowl doors are open (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) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.

Subtask 72-00-00-040-144-A ** ON A/C NOT FOR ALL

C. Deactivation of the Thrust Reverser System 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) Make sure that you did the deactivation of the thrust reverser system for ground maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 72-00-00-010-293-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Make sure that the thrust reverser cowl-doors are open (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 72-00-00-420-082-A ** ON A/C NOT FOR ALL

A. Installation of the Borescope Plugs
(1) Removal of the protection covers:

CAUTION: REMOVE THE PROTECTION COVERS FROM THE OPENINGS AS NECESSARY TO PREVENT ENGINE DAMAGE.

(a) Make sure that you remove the COVER - PROTECTION as necessary to prevent damage to the engine.
(2) Install the LPC borescope plugs as follows:

Borescope Plugs - LPC Plugs ** ON A/C NOT FOR ALL

(a) Find the three AP LPC plug (1), (2) and (4) bosses located on the LPC case at approximately the 2 o'clock position.

NOTE: LPC front case Part Number (P/N) 5377500-01 will have the borescope plug installed at the 8 o'clock position.

(b) Clean each AP LPC boss and borescope-plug thread with the BRUSH - WIRE, STAINLESS STEEL to remove carbon deposits and anti-gallant compounds.
(c) Wipe each AP LPC boss and borescope-plug thread clean with P05-005wipe, lint-free.
(d) Apply P06-054compound, paste, anti-seize on the threads of each AP LPC borescope-plug and boss. Wipe off unwanted paste.
1 For new or refurbished plugs with baked-on lubricant, do not do the wet application.
(e) Install the AP LPC-1 PLUG (2) and the cup washer (3) in the boss located at the 2 o'clock position between the LPC variable inlet-vanes and 1st stage blades:
1 When the plug (2) is in position, use the SOCKET STANDARD and the EXTENSION to thread the plug (2) with light force until it is fully installed on the case boss to make sure that there is no binding.
2 Make sure that the plug (2) is fully installed on the case boss.
(f) TORQUE the AP LPC-1 PLUG (2) to between 60 and 50 lbf.in (0.68 and 0.57 m.daN )

.
(g) Crimp the front part of the cup washer (3) into the slot of the AP LPC-1 PLUG (2).
(h) Install the AP LPC-2 PLUG (1) and the cup washer (3) in the boss located at the 2 o'clock position between the LPC 1st-stage vanes and 2nd stage blades:
1 When the plug (1) is in position, use the SOCKET STANDARD and the EXTENSION to thread the plug (1) with light force until it is fully installed on the case boss to make sure that there is no binding.
2 Make sure that the plug (1) is fully installed on the case boss.
(i) TORQUE the AP LPC-2 PLUG (1) to between 60 and 50 lbf.in (0.68 and 0.57 m.daN )

.
(j) Crimp the front part of the cup washer (3) into the slot of the AP LPC-2 PLUG (1).
(k) Install the AP LPC-3 PLUG (4) and the cup washer (3) in the boss located at the 2 o'clock position between the LPC 2nd-stage vanes and 3rd stage blades:
1 When the plug (4) is in position, use the SOCKET STANDARD and the EXTENSION to thread the plug (4) with light force until it is fully installed on the case boss to make sure that there is no binding.
2 Make sure that the plug (4) is fully installed on the case boss.
(l) TORQUE the AP LPC-3 PLUG (4) to between 60 and 50 lbf.in (0.68 and 0.57 m.daN )

.
(m) Crimp the front part of the cup washer (3) into the slot of the AP LPC-3 PLUG (4).
(n) Install the fan exit-liner segments (Ref. AMM TASK 72-21-08-400-801).

CAUTION: MAKE SURE THAT THE CASE LOCK RINGS ARE CORRECTLY INSTALLED BEFORE YOU INSTALL THE BORESCOPE PLUGS. IF YOU DO NOT OBEY THIS PRECAUTION, YOU CAN CAUSE DAMAGE TO THE LOCK RINGS.

CAUTION: DO NOT APPLY MORE THAN THE MAXIMUM PERMITTED TORQUE TO THE PLUG. IF YOU DO NOT OBEY THIS PRECAUTION, YOU CAN CAUSE DAMAGE TO THE PLUG.

CAUTION: MAKE SURE THAT THE PLUG HEAD IS FULLY INSTALLED IN THE BORESCOPE PLUG BOSS. IF YOU DO NOT OBEY THIS PRECAUTION, YOU CAN CAUSE DAMAGE TO THE PLUG.

CAUTION: MAKE SURE THAT THE POSITION OF THE BORESCOPE PLUG END IS CORRECT. TO DO THIS, COMPRESS AND RELEASE THE SHAFT/SPRING AND MAKE SURE THAT THE PLUG END GOES BACK TO THE CENTER POSITION. A BENT SHAFT OR DAMAGED SPRING CAN CAUSE INCORRECT SEATING OF THE PLUG.

(3) Install the HPC borescope plugs as follows:

Borescope Plugs - The HPC Plugs ** ON A/C NOT FOR ALL

(a) Find the eight HPC borescope plug (14), (15), (16), (26), (36), (37), (38) and (39) bosses located on the HPC at approximately the 2 o'clock to 3 o'clock position.
(b) Clean each AP HPC boss and borescope-plug thread. Use the BRUSH - WIRE, STAINLESS STEEL to remove carbon deposits and anti-gallant compounds.
(c) Wipe each AP HPC boss and borescope-plug thread clean with P05-005wipe, lint-free.
(d) Apply P06-054compound, paste, anti-seize on the threads of each AP HPC borescope-plug and boss. Wipe off unwanted paste.
1 For new or refurbished plugs with baked-on lubricant, do not do the wet application.
(e) Install the AP HPC-1 PLUG (14) in the boss located at the 3 o'clock position between the HPC Inlet Guide Vanes (IGV) and 1st stage rotor. See sheet 1 of the figure:

Borescope Plugs - The HPC Plugs ** ON A/C NOT FOR ALL

1 When the plug (14) is in position, use the SOCKET STANDARD and the EXTENSION to thread the plug (14) with light force until it is fully installed on the case boss to make sure that there is no binding.
2 Make sure that the plug (14) is fully installed on the case boss.
(f) TORQUE the AP HPC-1 PLUG (14) to between 43 and 36 lbf.in (0.49 and 0.41 m.daN )

.
(g) Install the AP HPC-2 PLUG (15) in the boss located at the 2 o'clock position between the HPC 1st-stage stator and 2nd stage rotor:
1 When the plug (15) is in position, use the SOCKET STANDARD and the EXTENSION to thread the plug (15) with light force until it is fully installed on the case boss to make sure that there is no binding.
2 Make sure that the plug (15) is fully installed on the case boss.
(h) TORQUE the AP HPC-2 PLUG (15) to between 43 and 36 lbf.in (0.49 and 0.41 m.daN )

.
(i) Install the AP HPC-3 PLUG (26) in the boss located at the 4 o'clock position between the HPC 2nd-stage stator and 3rd stage rotor. See sheet 2 of the figure:

Borescope Plugs - The HPC Plugs ** ON A/C NOT FOR ALL

1 When the plug (26) is in position, use the SOCKET STANDARD and the EXTENSION to thread the plug (26) with light force until it is fully installed on the case boss to make sure that there is no binding.
2 Make sure that the plug (26) is fully installed on the case boss.
(j) TORQUE the AP HPC-3 PLUG (26) to between 43 and 36 lbf.in (0.49 and 0.41 m.daN )

.
(k) Install the AP HPC-4 PLUG (16) in the boss located at the 2 o'clock position between the HPC 3rd-stage stator and 4th stage rotor. See sheet 1 of the figure:

Borescope Plugs - The HPC Plugs ** ON A/C NOT FOR ALL

1 When the plug (16) is in position, use the SOCKET STANDARD and the EXTENSION to thread the plug (16) with light force until it is fully installed on the case boss to make sure that there is no binding.
2 Make sure that the plug (16) is fully installed on the case boss.
(l) TORQUE the AP HPC-4 PLUG (16) to between 43 and 36 lbf.in (0.49 and 0.41 m.daN )

.

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

(m) Install the AP HPC-5 PLUG (37) in the boss located at the 3 o'clock position between the HPC 4th-stage stator and 5th stage rotor. See sheet 3 of the figure:

Borescope Plugs - The HPC Plugs ** ON A/C NOT FOR ALL

1 When the plug (37) is in position, use the SOCKET STANDARD and the EXTENSION to thread the plug (37) with light force until it is fully installed on the case boss to make sure that there is no binding.
2 Make sure that the plug (37) is fully installed on the case boss.

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

POST SB C-72-00-0098A (Config-3 Improved Assembly Process)

(n) Install the AP HPC-5 PLUG (37) in the boss located at the 3 o'clock position between the HPC 4th-stage stator and 5th stage rotor. See sheet 3 of the figure:

Borescope Plugs - The HPC Plugs ** ON A/C NOT FOR ALL

1 Apply P03-001lubricant, aircraft turbine engine (synthetic base) on the plunger bearing area while you rotate the plunger until the bearing area moves freely.
2 When the plug (37) is in position, use the SOCKET STANDARD and the EXTENSION to thread the plug (37) with light force until it is fully installed on the case boss to make sure that there is no binding.
3 Make sure that the plug (37) is fully installed on the case boss.

END OF POST SB C-72-00-0098A (Config-3 Improved Assembly Process)

(o) TORQUE the AP HPC-5 PLUG (37) to between 59 and 52 lbf.in (0.67 and 0.59 m.daN )

.

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

(p) Install the AP HPC-6 PLUG (36) in the boss located at the 2:30 o'clock position between the HPC 5th-stage stator and 6th stage rotor:
1 When the plug (36) is in position, use the SOCKET STANDARD and the EXTENSION to thread the plug (36) with light force until it is fully installed on the case boss to make sure that there is no binding.
2 Make sure that the plug (36) is fully installed on the case boss.

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

POST SB C-72-00-0098A (Config-3 Improved Assembly Process)

(q) Install the AP HPC-6 PLUG (36) in the boss located at the 2:30 o'clock position between the HPC 5th-stage stator and 6th stage rotor:
1 Apply P03-001lubricant, aircraft turbine engine (synthetic base) on the plunger bearing area while you rotate the plunger until the bearing area moves freely.
2 When the plug (36) is in position, use the SOCKET STANDARD and the EXTENSION to thread the plug (36) with light force until it is fully installed on the case boss to make sure that there is no binding.
3 Make sure that the plug (36) is fully installed on the case boss.

END OF POST SB C-72-00-0098A (Config-3 Improved Assembly Process)

(r) TORQUE the AP HPC-6 PLUG (36) to between 59 and 52 lbf.in (0.67 and 0.59 m.daN )

.
(s) Install the AP HPC-7 PLUG (38) in the boss located at the 2:30 o'clock position between the HPC 6th-stage stator and 7th stage rotor:
1 When the plug (38) is in position, use the SOCKET STANDARD and the EXTENSION to thread the plug (38) with light force until it is fully installed on the case boss to make sure that there is no binding.
2 Make sure that the plug (38) is fully installed on the case boss.

(t) TORQUE the AP HPC-7 PLUG (38) to between 43 and 36 lbf.in (0.49 and 0.41 m.daN )

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

(u) Install the AP HPC-8 PLUG (39) in the boss located at the 3 o'clock position between the HPC 7th-stage stator and 8th stage rotor:
1 When the plug (39) is in position, use the SOCKET STANDARD and the EXTENSION to thread the plug (39) with light force until it is fully installed on the case boss to make sure that there is no binding.
2 Make sure that the plug (39) is fully installed on the case boss.

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

POST SB C-72-00-0098A (Config-3 Improved Assembly Process)

(v) Install the AP HPC-8 PLUG (39) in the boss located at the 3 o'clock position between the HPC 7th-stage stator and 8th stage rotor:
1 Apply P03-001lubricant, aircraft turbine engine (synthetic base) on the plunger bearing area while you rotate the plunger until the bearing area moves freely.
2 When the plug (39) is in position, use the SOCKET STANDARD and the EXTENSION to thread the plug (39) with light force until it is fully installed on the case boss to make sure that there is no binding.
3 Make sure that the plug (39) is fully installed on the case boss.

END OF POST SB C-72-00-0098A (Config-3 Improved Assembly Process)

(w) TORQUE the AP HPC-8 PLUG (39) to between 75 and 68 lbf.in (0.85 and 0.77 m.daN )

.

PRE SB C72-00-0043A (Config-1 Initial Design Configuration)

(4) Install the diffuser-case borescope plug as follows:

Borescope Plugs - The Diffuser Case and HPT Plugs ** ON A/C NOT FOR ALL

(a) Find the AP DIFF-1 PLUG (49) boss located on the diffuser case at approximately the 3 o'clock position.
(b) Clean the AP boss and borescope plug thread. Use the BRUSH - WIRE, STAINLESS STEEL to remove carbon deposits and anti-gallant compounds.
(c) Wipe the AP boss and borescope plug thread clean with P05-005wipe, lint-free.
(d) Apply P06-054compound, paste, anti-seize on the threads of each AP DIFF borescope-plug and boss. Wipe off unwanted paste.
1 For new or refurbished plugs with baked-on lubricant, do not do the wet application.

(e) Install the AP DIFF-1 PLUG (49) in the boss located at the 3 o'clock position between the fuel nozzles and diffuser-case rear flange:
1 When the plug (49) is in position, use the SOCKET STANDARD and the EXTENSION to thread the plug (49) with light force until it is fully installed on the case boss to make sure that there is no binding.
2 Make sure that the plug (49) is fully installed on the case boss.
(f) TORQUE the AP DIFF-1 PLUG (49) to between 120 and 100 lbf.in (1.36 and 1.13 m.daN )

.

END OF PRE SB C72-00-0043A (Config-1 Initial Design Configuration)

POST SB C72-00-0043A (Config-2 Assembly Durability Improvement Configuration) and POST SB C-72-00-0098A (Config-3 Improved Assembly Process)

(5) Install the diffuser-case borescope plugs as follows:
(a) Find the AP DIFF-1 PLUG (49) boss located on the diffuser case at approximately the 3 o'clock position.

Borescope Plugs - The Diffuser Case and HPT Plugs ** ON A/C NOT FOR ALL

(b) Find the AP DIFF-2 PLUG (73) boss located on the diffuser case at approximately the 10 o'clock position.

Borescope Plugs - (Install The Diffuser Case Plug) (Config-2 Case Assembly Durability Improvement Configuration) ** ON A/C NOT FOR ALL

(c) Clean the AP bosses and borescope plug threads. Use the BRUSH - WIRE, STAINLESS STEEL to remove carbon deposits and anti-gallant compounds.
(d) Wipe the AP bosses and borescope plug threads clean with P05-005wipe, lint-free.
(e) Apply P06-054compound, paste, anti-seize on the threads of each AP DIFF borescope-plug and boss. Wipe off unwanted paste.
1 For new or refurbished plugs with baked-on lubricant, do not do the wet application.

(f) Install the AP DIFF-1 PLUG (49) in the boss located at the 3 o'clock position between the fuel nozzles and diffuser-case rear flange:

Borescope Plugs - The Diffuser Case and HPT Plugs ** ON A/C NOT FOR ALL

1 Use the SOCKET STANDARD and the EXTENSION to thread the plug (49) with light force until it is fully installed on the case boss to make sure that there is no binding.
2 Make sure that the plug (49) is fully installed on the case boss.
(g) TORQUE the AP DIFF-1 PLUG (49) to between 43 and 36 lbf.in (0.49 and 0.41 m.daN )

.
(h) Install the AP DIFF-2 PLUG (73) in the boss located at the 10 o'clock position on the diffuser-case forward flange:

Borescope Plugs - (Install The Diffuser Case Plug) (Config-2 Case Assembly Durability Improvement Configuration) ** ON A/C NOT FOR ALL

1 Use the SOCKET STANDARD and the EXTENSION to thread the plug (73) with light force until it is fully installed on the case boss to make sure that there is no binding.
2 Make sure that the plug (73) is fully installed on the case boss.
(i) TORQUE the AP DIFF-2 PLUG (73) to between 43 and 36 lbf.in (0.49 and 0.41 m.daN )

.

END OF POST SB C72-00-0043A (Config-2 Assembly Durability Improvement Configuration) and POST SB C-72-00-0098A (Config-3 Improved Assembly Process)

(6) Install the HPT and TIC borescope plugs as follows:
(a) Find the AP HPT-1 PLUG (50) boss located on the HPT at approximately the 5 o'clock position.

Borescope Plugs - The Diffuser Case and HPT Plugs ** ON A/C NOT FOR ALL

(b) Find the AP TIC-1 PLUG (60) boss located on the HPT at approximately the 1:30 o'clock position.

Borescope Plugs - The TIC and LPT Plugs ** ON A/C NOT FOR ALL

(c) Clean each AP HPT boss and borescope-plug thread. Use the BRUSH - WIRE, STAINLESS STEEL to remove carbon deposits and anti-gallant compounds.
(d) Wipe each AP boss and borescope plug thread clean with P05-005wipe, lint-free.
(e) Apply P06-054compound, paste, anti-seize on the threads of the AP HPT-1 PLUG (50) borescope-plug.

(f) Install the AP HPT-1 PLUG (50) in the boss located at the 5 o'clock position between the HPT 1st-stage rotor, 2nd stage stator and 2nd stage rotor:

Borescope Plugs - The Diffuser Case and HPT Plugs ** ON A/C NOT FOR ALL

1 When the plug (50) is in position, use the SOCKET STANDARD and the EXTENSION to thread the plug (50) with light force until it is fully installed on the case boss to make sure that there is no binding.
2 Make sure that the plug (50) is fully installed on the case boss.
(g) TORQUE the AP HPT-1 PLUG (50) to between 120 and 105 lbf.in (1.36 and 1.19 m.daN )

.
(h) Apply P06-054compound, paste, anti-seize on the threads of the AP TIC-1 PLUG (60) borescope-plug.
(i) Install the AP TIC-1 PLUG (60) in the boss located at the 1:30 o'clock position between the TIC connecting rods:

Borescope Plugs - The TIC and LPT Plugs ** ON A/C NOT FOR ALL

1 When the plug (60) is in position, use the SOCKET STANDARD and the EXTENSION to thread the plug (60) with light force until it is fully installed on the case boss to make sure that there is no binding.
2 Make sure that the plug (60) is fully installed on the case boss.
(j) TORQUE the AP TIC-1 PLUG (60) to between 200 and 150 lbf.in (2.26 and 1.70 m.daN )

(7) Install the LPT borescope plugs as follows:

Borescope Plugs - The TIC and LPT Plugs ** ON A/C NOT FOR ALL

(a) Find the AP LPT PLUG (61) and (62) bosses located on the LPT at approximately the 2:30 o'clock position.
(b) Clean each AP LPT boss and borescope-plug thread. Use the BRUSH - WIRE, STAINLESS STEEL to remove carbon deposits and anti-gallant compounds.
(c) Wipe each AP boss and borescope plug thread clean with P05-005wipe, lint-free.
(d) Apply P06-054compound, paste, anti-seize by SPOP 169 on the threads of each AP LPT borescope-plug and boss (Ref. AMM TASK 70-28-00-910-807).
1 For new or refurbished plugs with baked-on lubricant, do not do the wet application.
(e) Install the AP LPT-1 PLUG (61) in the boss located at the 2:30 o'clock position between the LPT 1st-stage rotor, 2nd stage stator and 2nd stage rotor:
1 When the plug (61) is in position, use the SOCKET STANDARD and the EXTENSION to thread the plug (61) with light force until it is fully installed on the case boss to make sure that there is no binding.
2 Make sure that the plug (61) is fully installed on the case boss.
(f) TORQUE the AP LPT-1 PLUG (61) to between 162 and 148 lbf.in (1.83 and 1.67 m.daN )

.
(g) Install the AP LPT-2 PLUG (62) in the boss located at the 2:30 o'clock position between the LPT 2nd-stage rotor, 3rd stage stator and 3rd stage rotor:
1 When the plug (62) is in position, use the SOCKET STANDARD and the EXTENSION to thread the plug (62) with light force until it is fully installed on the case boss to make sure that there is no binding.
2 Make sure that the plug (62) is fully installed on the case boss.
(h) TORQUE the AP LPT-2 PLUG (62) to between 162 and 148 lbf.in (1.83 and 1.67 m.daN )

.
(8) Examine the assembly for foreign objects, damage and correct assembly.

5. Close-up
Subtask 72-00-00-410-250-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 72-00-00-440-136-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 72-00-00-410-251-A ** ON A/C NOT FOR ALL

C. Close Access
(1) 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.
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 02:47:09 UTC