Installation of the Scavenge Screen Plugs [CFML]

TASK 79-21-05-400-801-A
Installation of the Scavenge Screen Plugs

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: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

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

ZONE: 210
ZONE: 400
FIN: 3802EM

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)
No specific	Torque wrench: range to between 74.4 and 67.4 lbf.in (0.84 and 0.76 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
CP2101	graphite grease
(Material No.CP5070)	vaseline

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
400	POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
4	O-RING	EIPC 79-21-05-10-030
5	O-RING	EIPC 79-21-05-10-040
6	O-RING	EIPC 79-21-05-10-050
9	O-RING	EIPC 79-21-05-10-080
10	O-RING	EIPC 79-21-05-10-090

E. Referenced Information

REFERENCE	DESIGNATION
TASK 12-13-79-610-805-A	Check of the Oil Level and Replenishing
TASK 71-00-00-710-815-A	Idle Leak Check
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
Scavenge Screen Plugs

3. Job Set-up
Subtask 79-21-05-941-051-A

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) Make sure that the WARNING NOTICE(S) are 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) Make sure that the WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).

Subtask 79-21-05-010-051-A

B. Get Access
(1) Make sure that the fan cowl doors are open (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 79-21-05-420-050-A

A. Installation of the Double-Stage Scavenge Screen-Plug in the Lubrication Unit

CAUTION: DO NOT REMOVE THE HEXAGONAL MAGNETIC CHIP PLUG (PRE SB 79-0008 CONFIGURATION) FROM THE SCAVENGE SCREEN PLUG. IF YOU DO, DAMAGE TO THE ENGINE CAN OCCUR.

CAUTION: DO NOT USE THE HEXAGONAL MAGNETIC CHIP PLUG (PRE SB 79-0008 CONFIGURATION) TO REMOVE THE SCAVENGE SCREEN PLUG. IF YOU DO, AN OIL LEAK CAN OCCUR.

(1) Remove all the CAP - PROTECTION and COVER - PROTECTION from the openings, tubes, hoses and connectors.
(2) Make sure that the mating surfaces are clean and clear of unwanted materials.
(3) Lubricate the threads of the bolt (12) with CP2101 graphite grease.
(4) Lubricate the new EIPC 79-21-05-10-080 O-RING (9) and the new EIPC 79-21-05-10-090 O-RING (10) with vaseline (Material No.CP5070) .

CAUTION: WHEN YOU REPLACE THE O-RING IN EACH SCAVENGE-SCREEN GROOVE LOCATION, MAKE SURE THAT YOU USE THE CORRECT PART NUMBER. THIS IS BECAUSE THE DIMENSIONS OF THE DIFFERENT O-RINGS ARE ALMOST THE SAME. IF YOU DO NOT USE THE CORRECT PART NUMBER, DAMAGE TO THE LUBRICATION UNIT SYSTEM CAN OCCUR.

(5) Install the O-ring (10) and the O-ring (9) in the grooves of the double-stage scavenge screen-plug (2).
(6) Install the double-stage scavenge screen-plug (2) in the lubrication unit (1).
(7) Install the bolt (12) to attach the double-stage scavenge screen-plug (2) on the lubrication unit (1) and tighten it with your hand.
(8) TORQUE the bolt (12) to between 74.4 and 67.4 lbf.in (0.84 and 0.76 m.daN )

Subtask 79-21-05-420-051-A

B. Installation of the Triple-Stage Scavenge Screen-Plug in the Lubrication Unit

CAUTION: DO NOT REMOVE THE HEXAGONAL MAGNETIC CHIP PLUG (PRE SB 79-0008 CONFIGURATION) FROM THE SCAVENGE SCREEN PLUG. IF YOU DO, DAMAGE TO THE ENGINE CAN OCCUR.

CAUTION: DO NOT USE THE HEXAGONAL MAGNETIC CHIP PLUG (PRE SB 79-0008 CONFIGURATION) TO REMOVE THE SCAVENGE SCREEN PLUG. IF YOU DO, AN OIL LEAK CAN OCCUR.

(1) Remove all the CAP - PROTECTION and COVER - PROTECTION from the openings, tubes, hoses and connectors.
(2) Make sure that the mating surfaces are clean and clear of unwanted materials.
(3) Lubricate the threads of the bolt (8) with CP2101 graphite grease.
(4) Lubricate the new EIPC 79-21-05-10-030 O-RING (4), the new EIPC 79-21-05-10-040 O-RING (5) and the new EIPC 79-21-05-10-050 O-RING (6) with vaseline (Material No.CP5070) .

(5) Install the O-ring (6), the O-ring (5) and the O-ring (4) in the grooves of the triple-stage scavenge screen-plug (3).
(6) Install the triple-stage scavenge screen-plug (3) in the lubrication unit (1).
(7) Install the bolt (8) to attach the triple-stage scavenge screen-plug (3) on the lubrication unit (1) and tighten it with your hand.
(8) TORQUE the bolt (8) to between 74.4 and 67.4 lbf.in (0.84 and 0.76 m.daN )

Subtask 79-21-05-612-050-A

C. Check of the Oil Level and Replenishing (Ref. AMM TASK 12-13-79-610-805).

5. Close-up
Subtask 79-21-05-710-054-A

A. Test(s)
(1) Do the idle leak check (Ref. AMM TASK 71-00-00-710-815).

Subtask 79-21-05-410-050-A

B. Close Access
Make sure that the work area is clean and clear of tools and other items.
(1) 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
(2) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 04:34:07 UTC