Visual Inspection of the Oil filter Cartridge [CFML]

TASK 79-21-05-210-801-A
Visual Inspection of the Oil filter Cartridge

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.

ZONE: 400

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	WARNING NOTICE(S)

B. Work Zones and Access Panels

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

C. Referenced Information

REFERENCE	DESIGNATION
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
TASK 79-00-00-200-806-A	Visual Inspection of the A, B and C Sumps, the Accessory Gearbox (AGB) and the Transfer Gearbox Sump Scavenge Screen Plugs for Debris
TASK 79-00-00-281-805-A	Analyze Oil Particles
TASK 79-21-05-000-803-A	Removal of the Oil Filter Cartridge
TASK 79-21-05-400-803-A	Installation of the Oil Filter Cartridge
TASK 79-36-00-220-801-A	Detailed Inspection of the Oil Debris Monitoring System (ODMS) Sensor for Debris
TASK 80-11-05-210-801-A	Detailed Inspection of the Air Turbine Starter Magnetic Chip Detector

3. Job Set-up
Subtask 79-21-05-941-063-A

A. 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 ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).

Subtask 79-21-05-010-060-A

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

4. Procedure
Subtask 79-21-05-210-050-A

A. Do a visual inspection of the oil filter element for contamination.
(1) Remove the oil filter cartridge (Ref. AMM TASK 79-21-05-000-803).
(2) Examine the lubrication unit inner wall of the oil filter housing.
(3) Examine the removed oil filter element as follows:
(a) Take the filter element in both hands and put two pleats apart to show the contaminants at the bottom of these pleats. Do this at several location round the cartridge.
(4) If there is any findings:
(a) Perform oil debris monitoring system inspection (Ref. AMM TASK 79-36-00-220-801).
(b) Perform scavenge screen inspection (Ref. AMM TASK 79-00-00-200-806).
(c) Perform air turbine starter inspection (Ref. AMM TASK 80-11-05-210-801).
(d) Apply oil particle analysis (Ref. AMM TASK 79-00-00-281-805).

CAUTION: TAG THE REMOVED PARTICLES WITH THE OIL FILTER CARTRIDGE NAME. IF YOU DO NOT OBEY THIS INSTRUCTION, THERE IS A RISK THAT: - THE IDENTIFICATION OF THE SOURCE OF THE MATERIAL WILL BE INCORRECT DURING THE VISUAL INSPECTION AND LABORATORY ANALYSIS - THE INTERPRETATION OF THE RESULTS IN RELATION TO THE SERVICEABLE CRITERIA WILL NOT BE ACCURATE, AND - DAMAGE WILL OCCUR.

(5) If an oil filter impending or actual by-pass faults is triggered on the concerned engine, do not discard the oil filter and place it on hold as it could be requested for investigation by CFM.

Subtask 79-21-05-420-056-A

B. Install a new oil filter cartridge (Ref. AMM TASK 79-21-05-400-803).

5. Close-up
Subtask 79-21-05-410-056-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 WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 03:43:09 UTC