Removal of the Lubrication Unit [CFMB]

TASK 79-21-10-000-004-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	CAP - BLANKING
No specific	AR	CONTAINER 30 L(8 USGAL)
No specific	AR	COVER - PROTECTION
No specific	AR	PLIERS - CONNECTOR, JAW, SOFT
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. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
490	O-RING	AIPC 72-63-00-05-230

D. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 79-21-10-400-004-A	Installation of the Lubrication Unit
TASK 79-21-50-000-001-A	Removal of the Master Magnetic Chip Detector
General View of the Installed Lubrication Unit
Removal/Installation of the Lubrication Unit
Close-up View of the Installed Master Magnetic Chip Detector
Lubrication Unit

3. Job Set-up
Subtask 79-21-10-941-056-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 79-21-10-010-059-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 79-21-10-020-059-A ** ON A/C NOT FOR ALL

A. Removal of the Lubrication Unit.

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.

(1) Put a CONTAINER 30 L(8 USGAL) minimum capacity below the lubrication unit to collect a possible oil leakage during removal.
(2) Remove the master chip detector (50) (Ref. AMM TASK 79-21-50-000-001).
(3) Disconnect the electrical connector (20) from the main oil filter differential pressure switch (30). Use PLIERS - CONNECTOR, JAW, SOFT only if necessary.
(4) Disconnect the electrical connector (10) from the oil temperature sensor installed on the main oil filter housing. Use PLIERS - CONNECTOR, JAW, SOFT only if necessary.
(5) Remove the nut (280) and the bolt (290) which attach the clamp (300) to the bracket (320).
(6) Remove the nut (330) and the bolt (270).
(7) Remove the outer spring clip (260), the inner spring clip (240) and the bushings (250) from the oil supply tube (230).
(8) Remove the nut (90) and the bolt (80).
(9) Remove the outer spring clip (100), the inner spring clip (120) and the bushings (110) from the aft sump oil supply tube.
(10) Remove the 3 nuts (310) and bolts (340) which attach the bracket (320) to the lubrication unit (40). Remove the bracket (320).
(11) Remove the 4 bolts (170) and washers (180) which attach the square mounting flange of each scavenge tube (130), (140), (150) and (160), to the lubrication unit housing.
(12) Remove and keep the gaskets (190).
(13) Remove the 4 bolts (220) and washers (210) which attach the square mounting flange of the oil supply tube (230) to the lubrication unit housing.
(14) Remove and keep the gasket (200).
(15) Cut the lockwire and loosen the coupling nut to disconnect the supply tube (230) from the supply hose. Remove the supply tube (230).
(16) Disconnect the FWD sump supply tube (60), the aft sump supply hose (70) and the AGB/TGB supply hose (350) from their nipples on the lubrication unit (40).
(17) Release the QAD clamp:

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

(a) Loosen the nut (380) to release the QAD clamp (390). Remove the QAD clamp (390).
(18) Hold and carefully pull forward the lubrication unit (40) to remove it from the AGB.
(19) Remove and discard the O-rings (360) and (370).
(20) If lubrication unit drive shaft (480) comes out from the AGB with the lubrication unit (40), remove and discard the O-ring (490).
(a) Install the lubrication unit drive shaft (480) with a new AIPC 72-63-00-05-230 O-RING (490) on the AGB (Ref. AMM TASK 79-21-10-400-004).
(21) Remove the nipples (400), (410) and (420). Remove and discard the O-rings (430), (440) and (450).
(22) Put PLUG - BLANKING, CAP - BLANKING and COVER - PROTECTION on the open ports and orifices to prevent contamination.

[Rev.10 from 2021] 2026.04.01 13:00:24 UTC