Replacement of the Metering Plug (LU20) from the Oil Control Module [PW11]

TASK 79-21-02-960-801-A
Replacement of the Metering Plug (LU20) from the Oil Control Module

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AND THE ADJACENT COMPONENTS AFTER ENGINE SHUTDOWN. THE ENGINE, THE ENGINE OIL AND THE ADJACENT COMPONENTS 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 replace the metering plug (LU20) in the oil control module.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ADAPTER - TORQUE, STANDARD
No specific	Torque wrench: range to between 40 and 36 lbf.in (0.45 and 0.41 m.daN )
No specific	Torque wrench: range to between 165 and 148 lbf.in (1.86 and 1.67 m.daN )

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
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR, 461AL

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
2	PACKING	EIPC 79-21-02-01-360

E. Referenced Information

REFERENCE	DESIGNATION
TASK 24-21-61-000-803-A	Removal of the AC Generator Control-Harness
TASK 24-21-61-400-803-A	Installation of the AC Generator Control-Harness
TASK 71-00-00-780-802-A	Test No. 13 - Main Oil Pressure Test and Adjustment
TASK 71-00-00-860-832-A	Procedure to Prevent Engine Motoring and to Stop the Electrical Supply to the EEC
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
Replacement of the Metering Plug (LU20) from the Oil Control Module

3. Job Set-up
Subtask 79-21-02-941-052-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Do the procedure to prevent engine motoring and to stop the electrical supply to the Electronic Engine Control (EEC)
(Ref. AMM TASK 71-00-00-860-832).

Subtask 79-21-02-010-054-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

Subtask 79-21-02-040-052-A ** ON A/C NOT FOR ALL

C. Deactivation of the Thrust Reverser for Maintenance

WARNING: MAKE SURE THAT YOU DO THE DEACTIVATION OF THE THRUST REVERSER BEFORE YOU DO MAINTENANCE WORK ON OR AROUND THE THRUST REVERSER. IF YOU DO NOT DO THIS PROCEDURE, THERE IS A RISK OF UNWANTED OPERATION AND THUS OF INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.

(1) Do the deactivation of the thrust reverser system for maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 79-21-02-010-055-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Open the left thrust-reverser cowl-doors (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL

4. Procedure

CAUTION: WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.

Subtask 79-21-02-960-050-A ** ON A/C NOT FOR ALL

A. Replace the Metering Plug (LU20) from the Oil Control Module

Replacement of the Metering Plug (LU20) from the Oil Control Module ** ON A/C NOT FOR ALL

(1) Find the metering plug (LU20) (3) in the oil control module (1).
(2) Remove the power feeder cables to get access to the repair area, if necessary (Ref. AMM TASK 24-21-61-000-803).
(3) Remove the metering plug (3) from the oil control module (1) as follows:
(a) Remove the two bolts (5).

CAUTION: DO NOT USE TOOLS TO APPLY PRESSURE BELOW THE SEAL CAP. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO ENGINE PARTS CAN OCCUR.

(b) Remove the seal cap (4) from the oil control module (1).
(c) Remove and discard the packing (2).

PRE SB C-79-00-0003A (Config-1 Initial Design Configuration)

(d) Remove and replace the metering plug (LU20) (3).

NOTE: The replacement part kit has the replacement parts needed when installing the metering plug.

END OF PRE SB C-79-00-0003A (Config-1 Initial Design Configuration)

POST SB C-79-00-003A (Config-2 Adjusted Oil Pressure Improvement Configuration)

(4) Install the new metering plug (LU20) (3) as follows:
(a) Select a metering plug (LU20) (3) from the Table 1.
(b) If you use a different metering plug (3) to adjust the pressure, refer to (Ref. AMM TASK 71-00-00-780-802).

Table 1 - Metering Plug Orifice Diameter

Part Number	Inches	Millimeters
5325218CL1	0.010	0.254
5325218CL2	0.036	0.914
5325218CL3	0.050	1.270
5325218CL4	0.064	1.625
5325218CL5	0.079	2.006
5325218CL6	0.093	2.362
5325218CL7	0.107	2.717
5325218CL8	0.122	3.098
5325218CL9	0.136	3.454
5325218CL10	0.150	3.810
5325218CL11	0.165	4.191
5325218CL12	0.179	4.546

(c) Apply P03-001lubricant, aircraft turbine engine to the threads of the metering plug (LU20) (3).
(d) Install the metering plug (LU20) (3) into the oil control module (1) with the ADAPTER - TORQUE, STANDARD.
(e) Determine the run-on torque for the metering plug (LU20) (3).

NOTE: The run-on torque should be between 10 lbf.in (0.11 m.daN) and 30 lbf.in (0.34 m.daN).

(f) TORQUE the metering plug (LU20) (3) with a final torque of to between 165 and 148 lbf.in (1.86 and 1.67 m.daN )

plus the run-on torque until the same torque indication holds.
(g) Apply P03-001lubricant, aircraft turbine engine to the new EIPC 79-21-02-01-360 PACKING (2), the seal cap (4) and the threads of the two bolts (5).
(h) Install the packing (2) on the seal cap (4).
(i) Install the seal cap (4) with the two bolts (5).
(j) TORQUE the two bolts (5) to between 40 and 36 lbf.in (0.45 and 0.41 m.daN )

.

END OF POST SB C-79-00-003A (Config-2 Adjusted Oil Pressure Improvement Configuration)

(5) Install the power feeder cables, if necessary (Ref. AMM TASK 24-21-61-400-803).
(6) Examine the assembly for foreign objects, damage and correct assembly.

5. Close-up
Subtask 79-21-02-410-052-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the left thrust-reverser cowl-doors (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL

Subtask 79-21-02-440-051-A ** ON A/C NOT FOR ALL

B. Do the reactivation of the thrust reverser system after maintenance (Ref. AMM TASK 78-30-00-440-805).

Subtask 79-21-02-410-053-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 WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 03:41:35 UTC