Installation of the Back-up Oil Filter [CFMB]

TASK 79-21-10-400-006-A
Installation of the Back-up Oil Filter

FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** 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	ACCESS PLATFORM 1M(3 FT)
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.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	BACK-UP FILTER	AIPC 79-21-10-01-310
20	BACK-UP SEAL	AIPC 79-21-10-01-320
10	O-RING	AIPC 79-21-10-01-330
50	O-RING	AIPC 79-21-10-01-330

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
TASK 79-21-10-000-006-A	Removal of the Back-up Oil Filter
CMM 792115
Removal/Installation of the Back-up Filter

3. Job Set-up
Subtask 79-21-10-860-054-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) is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).

Subtask 79-21-10-010-062-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the fan cowl doors are open: (Ref. AMM TASK 71-13-00-010-040)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.

4. Procedure
Subtask 79-21-10-420-058-A ** ON A/C NOT FOR ALL

A. Installation of the Back-up Oil Filter

CAUTION: DO NOT USE ANOTHER MAGNET TO REMOVE PARTICLES FROM THE DETECTOR MAGNETS. THIS CAN DECREASE THE MAGNETIC PERFORMANCE OF THE EMCD.

(1) Get the back-up filter (30) you have removed before (Ref. AMM TASK 79-21-10-000-006). Make sure it has been cleaned as told in the Component Maintenance Manual of the lubrication unit: CMM 792115. If not available, and only if necessary, get a new AIPC 79-21-10-01-310 BACK-UP FILTER (30).
(2) Make sure that the back-up seal (20), the O-ring (50) and the O-ring (10) are in place on the replacement back-up filter (30). If in place on the filter, lubricate them with engine oil (Material No.CP2442) .
(3) If seals (20), (50) and (10) are not in place on the filter, do as follows:
(a) Lubricate a new AIPC 79-21-10-01-320 BACK-UP SEAL (20) with engine oil (Material No.CP2442) .
(b) Make sure (on the filter cover) that the back-up seal groove is clean.
(c) Install the new back-up seal

CAUTION: MAKE SURE THAT THE BACK-UP SEAL IS CORRECTLY SET WHEN YOU INSTALL IT. IF NOT, DAMAGE TO THE SEAL AND LEAKS FROM THE SCAVENGE SCREENS CAN OCCUR.

1 Install the new back-up seal (20) fully against the cover of the back-up filter. If necessary, CMM 792115 for correct installation of this type of seal.
(4) Lubricate a new AIPC 79-21-10-01-330 O-RING (50) and a new AIPC 79-21-10-01-330 O-RING (10) with engine oil (Material No.CP2442) .
(5) Make sure that the O-ring grooves are clean.
(6) Install the new O-rings in the lower and upper grooves of the back-up filter (30).
(7) Set the back-up filter

CAUTION: MAKE SURE THE FILTER PIN IS CORRECTLY LOCATED BETWEEN TWO INNER RIBS OF THE COVER, AND NOT IN THE AXIS OF TAPPERED HOLES OF THE COVER . INCORRECT INSTALLATION CAN CAUSE AN IMPORTANT OIL LEAKAGE DURING ENGINE OPERATION WITH POSSIBLE IFSD AND ENGINE FAILURE.

CAUTION: DO NOT TURN THE COVER TO PREVENT DAMAGE TO THE FILTER.

(a) Set the back-up filter in position. Push the filter into the housing until it comes against the filter housing flange.
(8) Lubricate the threads of the bolts (40) with engine oil (Material No.CP2442) .
(9) Install the bolts to attach the back-up filter to the lubrication unit housing. TORQUE the bolts (40) to between 45 and 35 lbf.in (0.51 and 0.40 m.daN )

.
(10) Remove the oil drain container from under the back-up filter.

Subtask 79-21-10-790-051-A ** ON A/C NOT FOR ALL

B. Do a minimum idle check (Ref. AMM TASK 71-00-00-710-006) and make sure there is no leakage from the back-up oil filter.

5. Close-up
Subtask 79-21-10-410-057-A ** ON A/C NOT FOR ALL

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

[Rev.10 from 2021] 2026.04.01 03:39:11 UTC