Replacement of the Main Oil Supply Filter and Check of the Electrical Master Chip Detector [CFMB]

TASK 79-35-00-040-044-A
Replacement of the Main Oil Supply Filter and Check of the Electrical Master Chip Detector

1. Reason for the Job
MMEL 79-09-02C
ENG 1(2) OIL FILTER CLOG ALERT
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

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

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 24-42-00-862-001-A	De-energize the Ground Service Network Supplied from the External Power
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 79-00-00-281-002-A	Check of the Electrical Master Chip Detector (EMCD) for Particles
TASK 79-21-10-920-002-B	Remove and Discard Supply Filter

3. Job Set-up
Subtask 79-35-00-861-051-A ** ON A/C NOT FOR ALL

A. Energize the ground service network (Ref. AMM TASK 24-42-00-861-001).

Subtask 79-35-00-941-056-A ** ON A/C NOT FOR ALL

B. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the pushbutton switch of the ENG/FADEC GND PWR/1(2) is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).

Subtask 79-35-00-010-053-A ** ON A/C NOT FOR ALL

C. Open the fan cowl doors: (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 79-35-00-040-054-A ** ON A/C NOT FOR ALL

A. Replacement of the Main Oil Filter
(1) Replace the main oil filter element (Ref. AMM TASK 79-21-10-920-002).

Subtask 79-35-00-040-052-A ** ON A/C NOT FOR ALL

B. Replacement of the Electric Master Chip Detector
(1) Remove the Electric Master Chip Detector (Ref. AMM TASK 79-00-00-281-002).

Subtask 79-35-00-040-053-A ** ON A/C NOT FOR ALL

C. Inspection of the Electric Master Chip Detector
(1) Examine the Electric Master Chip Detector plug for debris presence (Ref. AMM TASK 79-00-00-281-002).
(a) Check for debris build-up within the gap between the 2 magnet poles.
If presence of particles then keep them for laboratory analysis as required.
(2) Clean the Electric Master Chip Detector (Ref. AMM TASK 79-00-00-281-002).
(3) Install the Electric Master Chip Detector (Ref. AMM TASK 79-00-00-281-002).

5. Close-up
Subtask 79-35-00-410-053-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
(3) Remove the WARNING NOTICE(S).
(4) Make an entry in the log book.

Subtask 79-35-00-862-051-A ** ON A/C NOT FOR ALL

B. De-energize the ground service network (Ref. AMM TASK 24-42-00-862-001).

[Rev.10 from 2021] 2026.04.01 03:39:53 UTC