Installation of the Oil Filter Differential Pressure Switch [CFMB]

TASK 79-35-15-400-003-A
Installation of the Oil Filter Differential Pressure Switch

FIN: 4001EN ** ON A/C NOT FOR ALL

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	PLIERS - CONNECTOR, JAW, SOFT
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 45 and 35 lbf.in (0.51 and 0.40 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2101)	graphite grease
(Material No.CP2442)	engine oil

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
30	O-RING	AIPC 79-35-15-01-030
40	O-RING	AIPC 79-35-15-01-040

E. Referenced Information

REFERENCE	DESIGNATION
TASK 71-00-00-710-006-B	Minimum Idle Check
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-B	Closing of the Fan Cowl Doors
Oil Filter Differential-Pressure-Switch

3. Job Set-up
Subtask 79-35-15-860-050-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).

Subtask 79-35-15-010-051-A ** ON A/C NOT FOR ALL

B. Make sure that the fan cowl doors are open: (Ref. AMM TASK 71-13-00-010-040)
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR

4. Procedure
Subtask 79-35-15-420-050-A ** ON A/C NOT FOR ALL

A. Installation of the Differential Pressure Switch
(1) Remove blanking plugs and caps.
(2) Lubricate new AIPC 79-35-15-01-030 O-RING (30) and AIPC 79-35-15-01-040 O-RING (40) with engine oil (Material No.CP2442) and install them on the differential pressure switch.
(3) Lubricate the threads of bolts (50) with graphite grease (Material No.CP2101)
(4) Engage the differential pressure switch (20) in the lubrication unit.
(5) Attach the differential pressure switch (20) to the lubrication unit with bolts (50).
(6) TORQUE the bolts (50) to between 45 and 35 lbf.in (0.51 and 0.40 m.daN )

(7) Make sure that all the electrical connections are clean and in the correct condition.
(8) Connect the HJ7 harness connector (10) to the differential pressure switch. Use PLIERS - CONNECTOR, JAW, SOFT only if necessary.
(9) Make sure that the connector is fully engaged and do not move.

Subtask 79-35-15-942-050-A ** ON A/C NOT FOR ALL

B. Remove the WARNING NOTICE(S).

Subtask 79-35-15-710-050-A ** ON A/C NOT FOR ALL

C. Do a minimum idle check (Ref. AMM TASK 71-00-00-710-006) and a check for leaks.

5. Close-up
Subtask 79-35-15-410-050-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 fan cowl doors: (Ref. AMM TASK 71-13-00-410-040)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR

[Rev.10 from 2021] 2026.04.01 03:39:55 UTC