Removal of the Magnetic Bars from the Scavenge Screen Plug [CFML]

TASK 79-21-05-000-802-A
Removal of the Magnetic Bars from the Scavenge Screen Plug

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.

WARNING: YOU MUST FIND AND OBEY THE MANUFACTURER'S HEALTH AND SAFETY DATA FOR THE MATERIAL (MSDS). YOU MUST ALSO REFER TO LOCAL REGULATIONS TO MAKE SURE THAT YOU DO THE PROCEDURES SAFELY. IF YOU DO NOT DO THIS, AN INJURY OR ENVIRONMENTAL DAMAGE CAN OCCUR.

WARNING: DO NOT TOUCH THE FUEL OR OIL SYSTEM COMPONENTS FOR A SHORT TIME AFTER THE ENGINE IS SHUT DOWN. THE ENGINE COMPONENTS STAY HOT FOR SOME TIME AND CAN CAUSE INJURY.

WARNING: USE PERSONAL PROTECTION EQUIPMENT. USE THE ENGINE OIL IN A WELL-VENTILATED AREA. ENGINE OIL IS TOXIC.

FIN: 3881EM ** 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	CAP - PROTECTION
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. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
TASK 79-21-05-000-801-A	Removal of the Scavenge Screen Plugs
Magnetic Bars from the Scavenge Screen Plug

3. Job Set-up
Subtask 79-21-05-941-060-A ** ON A/C NOT FOR ALL

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 79-21-05-010-057-A ** ON A/C NOT FOR ALL

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 79-21-05-020-055-A ** ON A/C NOT FOR ALL

A. Remove the magnetic bar (3) from the triple stage scavenge screen plug (2) as follows:

CAUTION: DO NOT TRY TO LOOSEN AND/OR REMOVE THE SCREEN FROM THE PLUG BODY BEFORE REMOVAL/INSTALLATION OF THE MAGNETIC BAR. THE PLUG BODY AND THE SCREEN ARE A NON-SEPARABLE ASSEMBLY. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE COULD OCCUR.

(1) Remove the triple scavenge screen plug (2) from the lubrication unit (1) (Ref. AMM TASK 79-21-05-000-801).
(2) Remove the magnetic chip plug (4) from the triple stage scavenge screen plug (2).
(3) Remove and discard the O-ring (5) from the groove of the magnetic chip plug (4) of the triple stage scavenge screen plug (2).
(4) Remove the magnetic bar (3) from the triple stage scavenge screen plug (2).
(5) Install the CAP - PROTECTION and COVER - PROTECTION on the all open ports, open tubes, hoses and connectors.

Subtask 79-21-05-020-056-A ** ON A/C NOT FOR ALL

B. Remove the magnetic bar (7) from the double stage scavenge screen plug (6) as follows:

(1) Remove the double stage scavenge screen plug (6) from the lubrication unit (1) (Ref. AMM TASK 79-21-05-000-801) .
(2) Remove the magnetic chip plug (8) from the double stage scavenge screen plug (6).
(3) Remove and discard the O-ring (9) from the groove of the magnetic chip plug (8) of the double stage scavenge screen plug (6).
(4) Remove the magnetic bar (7) from the double stage scavenge screen plug (6).
(5) Install the CAP - PROTECTION and COVER - PROTECTION on the all open ports, open tubes, hoses and connectors.

[Rev.8 from Aug 2017] 2026.04.01 03:43:05 UTC