Removal of the Oil Filter Differential Pressure Sensor [CFML]

TASK 79-35-05-000-801-A
Removal of the Oil Filter Differential Pressure Sensor

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.

FIN: 4077KS

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 5 L (1.32 USGAL)
No specific	AR	COVER - PROTECTION
No specific	AR	WARNING NOTICE(S)

B. 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

C. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
6	O-RING	EIPC 79-35-05-01-030
5	O-RING	EIPC 79-35-05-01-040

D. Referenced Information

REFERENCE	DESIGNATION
TASK 12-13-79-610-803-A	Draining of the Lubrication Unit
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
Oil Filter Differential Pressure Sensor

3. Job Set-up
Subtask 79-35-05-941-050-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, and
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 79-35-05-010-050-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 79-35-05-020-050-A

A. Removal of the Oil Filter Differential Pressure Sensor (1)
(1) Put a CONTAINER 5 L (1.32 USGAL) below the Oil Filter Differential Pressure Sensor.
(2) Drain the Lube Unit (Ref. AMM TASK 12-13-79-610-803).
(3) Disconnect the HJ6A harness electrical connector (3) from the oil filter differential pressure sensor (1).
(4) Remove the two bolts (4) that attach the oil filter differential pressure sensor (1) on the lubrication unit (2).
(5) Remove the oil filter differential pressure sensor (1) from the lubrication unit (2).
(6) Remove and discard the EIPC 79-35-05-01-040 O-RING (5) and EIPC 79-35-05-01-030 O-RING (6) from the grooves of the oil filter differential pressure sensor (1).
(7) Install all the COVER - PROTECTION and CAP - PROTECTION on the openings, tubes, hoses and connectors.

[Rev.10 from 2021] 2026.04.01 03:43:42 UTC