Removal of the Lubrication Unit [CFMI]

TASK 79-21-10-000-001-A
Removal of the Lubrication Unit

WARNING: USE PROTECTIVE GLOVES AND BE CAREFUL WITH OIL SPLASHES WHEN YOU DISCONNECT OIL TUBES. HOT OIL CAN CAUSE DEEP BURNS.

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	CONTAINER 30 L(8 USGAL)
No specific	AR	PLUG - BLANKING
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 71-13-00-010-040-A	Opening of the Fan Cowl Doors
TASK 79-21-10-600-001-A	Preservation of the Lubrication Unit
Lubrication Unit

3. Job Set-up
Subtask 79-21-10-941-050-A ** ON A/C NOT FOR ALL

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 79-21-10-010-050-A ** ON A/C NOT FOR ALL

B. 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 79-21-10-020-057-A ** ON A/C NOT FOR ALL

A. Removal of the lubrication unit:
(1) Disconnect the electrical connector 4004ENA.
(2) Put a CONTAINER 30 L(8 USGAL) minimum capacity below the lubrication unit to collect a possible oil leakage during removal.
(3) Remove the bolts from the flange of each of these tubes:

CAUTION: USE TWO WRENCHES TO REMOVE OR INSTALL THE TUBE COUPLING NUTS:

ONE WRENCH TO HOLD THE UNION, AND
ONE TO LOOSEN OR TIGHTEN THE COUPLING NUT.

THIS PREVENTS DAMAGE TO THE PARTS.

(a) The forward sump scavenge tube (80).
(b) The aft sump scavenge tube (70).
(c) The AGB scavenge tube (60).
(d) The TGB scavenge tube (50).
(e) The oil supply tube (120) from the anti-siphon device.
(f) The oil return tube (100) to servo fuel heater.

NOTE: If gaskets are still in good condition, they may be reused.

(4) Disconnect the 3 oil supply (pressure) tubes (30), (40) and (110).
(5) Disconnect the 2 hoses comming from the oil differential pressure switch.
(6) Remove the lubrication unit:

CAUTION: HOLD THE LUBRICATION UNIT DURING CLAMP REMOVAL TO PREVENT DAMAGE TO DRIVE SHAFT AND SPLINES.

(a) Remove the clamp (90) that attaches the lubrication unit to the AGB.
(b) Pull and remove the lubrication unit from the AGB. Remove and discard the O-rings (10) and (20).
(c) If Drive shaft (200) comes out from the AGB with the lubrification unit, remove and discard O-ring (210). Reinstall the lubrification unit drive shaft with new O-ring.
(7) Remove the nipples (140), (150) and (160). Remove and discard the O-rings (170), (180) and (190).
(8) Put the PLUG-BLANKING in each disconnected line end.
(9) If necessary, preserve the lubrication unit (Ref. AMM TASK 79-21-10-600-001).

[Rev.10 from 2021] 2026.04.01 03:38:00 UTC