Replacement of the Lower Strainer [CFML]

TASK 79-11-05-960-803-A
Replacement of the Lower Strainer

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	CAP - PROTECTION
No specific	1	CONTAINER 30 L(8 USGAL)
No specific	AR	COVER - PROTECTION
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 46.45 and 42.05 lbf.in (0.52 and 0.48 m.daN )
No specific	Torque wrench: range to between 92.4 and 84.1 lbf.in (1.04 and 0.95 m.daN )
No specific	Torque wrench: range to between 120.75 and 109.25 lbf.in (1.36 and 1.23 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2442)	engine oil

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
12	GASKET	EIPC 79-11-05-01-090
13	RETAINING RING	EIPC 79-11-05-02-120
5	GASKET	EIPC 79-11-05-05-030
9	SEMI-SHOULDERED BUSHING	EIPC 79-11-05-05-070

E. Referenced Information

REFERENCE	DESIGNATION
TASK 12-13-79-610-808-A	Draining of the Oil Tank
TASK 71-00-00-710-815-A	Idle Leak Check
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-803-A	Closing of the Fan Cowl Doors
Lower Strainer

3. Job Set-up
Subtask 79-11-05-941-055-A

A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Put WARNING NOTICE(S) in position to tell persons not to operate:

The ENG/MODE selector switch
The ENG/MASTER 1(2) control switch.

(2) On the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).

Subtask 79-11-05-010-055-A

B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR

4. Procedure
Subtask 79-11-05-960-052-A

A. Replacement of the Lower Strainer

WARNING: USE PERSONAL PROTECTION EQUIPMENT. USE THE ENGINE OIL IN A WELL-VENTILATED AREA. ENGINE OIL IS TOXIC.

(1) Put a CONTAINER 30 L(8 USGAL) below the oil tank (10).
(2) Drain the oil tank (10) (Ref. AMM TASK 12-13-79-610-808).
(3) Removal of the lower strainer (14):
(a) Removal of the oil tube (2):
1 Loosen and remove the four nuts (4) to disconnect the oil tube (2).
2 Remove the four bolts (3) that attach the oil tube (1) to the oil tube (2).
3 Disconnect the oil tube (2) from the oil tube (1).
4 Remove and discard the gasket (5) from the oil tube (2).
5 Remove the two bolts (8) from the clamp (7) that attach the oil tube (2) to the bracket (6).
6 Remove the clamp (7) from the bracket (6).
7 Remove and discard the semi-shouldered bushing (9) from the oil tube (2).
8 Remove the four bolts (11) of the oil tube (2).
9 Disconnect the oil tube (2) from the oil tank (10).
10 Remove and discard the gasket (12) from the oil tube (2).
11 Remove the oil tube (2).
12 Let the oil drain into the CONTAINER 30 L(8 USGAL).
(b) Remove the retaining ring and lower strainer:

CAUTION: DO NOT USE A SCREWDRIVER OR EQUIVALENT TOOLS AS A LEVER. IF YOU DO NOT OBEY THIS INSTRUCTION, YOU CAN CAUSE DAMAGE TO THE STRAINER OR THE OIL TANK BODY.

1 Engage an equivalent tool into the removal notch of the retaining ring (13).
2 Pull out the first end of the retaining ring (13) with an equivalent tool.
3 Manually twist the retaining ring (13) until it is free from its grooves.
4 Remove the retaining ring (13).

NOTE: The strainer can fall when the retaining ring is removed.

5 Remove the lower strainer (14).
6 Install the COVER - PROTECTION and the CAP - PROTECTION on all the open ports, tubes, hoses and the disconnected connectors.
(4) Installation of the lower strainer (14):
(a) Remove all COVER - PROTECTION and the CAP - PROTECTION from the openings, tubes, hoses and connectors.
(b) Make sure that the mating faces are clean and clear of unwanted materials.
(c) Install the lower strainer (14) in correct position in the oil tank (10).
(d) Put the EIPC 79-11-05-02-120 RETAINING RING (13) on the lower strainer (14) with an equivalent tool.
(e) Installation of the oil tube (2):
1 Lubricate the threads of the four bolts (11) with engine oil (Material No.CP2442) .
2 Install the new EIPC 79-11-05-01-090 GASKET (12) and oil tube (2) in correct position on the oil tank (10).
3 Install the four bolts (11) to attach the oil tube (2) to the oil tank (10) and tighten with your hand.
4 TORQUE the four bolts (11) to between 120.75 and 109.25 lbf.in (1.36 and 1.23 m.daN )

.
5 Install the new EIPC 79-11-05-05-070 SEMI-SHOULDERED BUSHING (9) on the oil tube (2).
6 Install the clamp (7) on the bracket (6).
7 Install the two bolts (8) on the clamp (7) to attach the oil tube (2) to the bracket (6) and tighten with your hand.
8 TORQUE the two bolts (8) to between 46.45 and 42.05 lbf.in (0.52 and 0.48 m.daN )

.
9 Install the new EIPC 79-11-05-05-030 GASKET (5) and oil tube (2) in correct position on the oil tube (1).
10 Install the four bolts (3) and the four nuts (4) to attach the oil tube (2) to the oil tube (1) and tighten with your hand.
11 TORQUE the four nuts (4) to between 92.4 and 84.1 lbf.in (1.04 and 0.95 m.daN )

.
(5) Remove the CONTAINER 30 L(8 USGAL) kept below the oil tank (10).

Subtask 79-11-05-710-053-A

B. Test(s)
(1) Do the idle leak check (Ref. AMM TASK 71-00-00-710-815).

5. Close-up
Subtask 79-11-05-410-054-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 03:42:55 UTC