Removal of the Scavenge Oil Pump [IAE]

TASK 79-22-41-000-010-A
Removal of the Scavenge Oil Pump

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: DO NOT LET ENGINE OIL STAY ON YOUR SKIN FOR A LONG TIME. FLUSH THE OIL FROM YOUR SKIN WITH WATER. THE OIL IS POISONOUS AND CAN GO THROUGH YOUR SKIN AND INTO YOUR BODY.

CAUTION: DO NOT LET ENGINE FUEL OR OIL FALL ON THE ENGINE. UNWANTED FUEL OR OIL MUST BE REMOVED IMMEDIATELY WITH A CLEAN LINT FREE CLOTH. THE FUEL OR OIL CAN CAUSE DAMAGE TO THE SURFACE PROTECTION AND TO SOME PARTS.

ZONE: 400
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 5 L (1.32 USGAL)
No specific	AR	COVER - BLANKING
No specific	AR	WARNING NOTICE(S)
IAE1R18001	1	WRENCH

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 12-13-79-610-010-A	Drain the Engine Oil System
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 79-22-43-000-010-A	Removal of the Scavenge Oil Filter Assembly
TASK 79-22-45-000-010-A	Removal of the Magnetic Chip Detector
TASK 79-22-45-000-011-A	Removal of the Magnetic Chip Detector Housing
Scavenge Oil Tubes on the Scavenge Oil Pump
Scavenge Oil Tube
Scavenge Oil Pump and Scavenge Oil Tubes

3. Job Set-up
Subtask 79-22-41-941-051-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 79-22-41-010-050-A ** ON A/C NOT FOR ALL

B. Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR.

4. Procedure
Subtask 79-22-41-941-050-A ** ON A/C NOT FOR ALL

A. Put the CONTAINER 5 L (1.32 USGAL) below the scavenge oil pump to catch the drained oil.

Subtask 79-22-41-680-050-A ** ON A/C NOT FOR ALL

B. Drain the oil system (Ref. AMM TASK 12-13-79-610-010).

Subtask 79-22-41-020-060-A ** ON A/C NOT FOR ALL

C. Remove the magnetic chip detector
(1) Remove the magnetic chip detector (Ref. AMM TASK 79-22-45-000-010).
(2) Remove the magnetic chip detector housing (Ref. AMM TASK 79-22-45-000-011).

Subtask 79-22-41-010-051-A ** ON A/C NOT FOR ALL

D. Remove the scavenge oil filter housing assembly (Ref. AMM TASK 79-22-43-000-010).

Subtask 79-22-41-020-051-A ** ON A/C NOT FOR ALL

E. Remove the two scavenge oil tubes (2) and (18) from the scavenge oil pump

Scavenge Oil Tubes on the Scavenge Oil Pump ** ON A/C NOT FOR ALL

(1) Remove the scavenge oil tube (2).
(a) Remove the three bolts (19) which attach the tube (2) to the scavenge oil pump.
(b) Remove the three bolts (3) which attach the tube (2) to the LP compressor/intermediate case.
(c) Drain the oil into the CONTAINER 5 L (1.32 USGAL).
(d) Remove the tube (2).
(e) Remove and discard the rings (1) and (4).
(2) Remove the scavenge oil tube (18).
(a) Remove the three bolts (5) and washer (6) which attach the tube (18) to the scavenge oil pump.
(b) Drain the oil into the CONTAINER 5 L (1.32 USGAL).
(c) Remove the tube (18).
(d) Remove and discard the packing (17).

Subtask 79-22-41-020-052-A ** ON A/C NOT FOR ALL

F. Remove the scavenge oil tube (14) from the scavenge oil pump and the scavenge oil tube (7).

Scavenge Oil Tube ** ON A/C NOT FOR ALL

PRE SBE 79-0056

(1) Disconnect the scavenge oil tube (14) from the scavenge oil tube (7). Use the IAE1R18001 WRENCH.
(2) Remove the bolt (8), washer (9), spacer (13), clipnut (12) and clip (10) from the bracket (11).
(3) Remove the three bolts (15) that attach the tube (14) to the scavenge oil pump.
(4) Drain the oil into the CONTAINER 5 L (1.32 USGAL).
(5) Remove the tube (14) from above the angle gearbox support (22).
(6) Remove and discard the packing (16).

END OF PRE SBE 79-0056

POST SBE 79-0056

(7) Disconnect the scavenge oil tube (14) from the scavenge oil tube (7). Use the IAE1R18001 WRENCH.
(8) Remove the nut (50), bolt (8) and clip (10) from the bracket (11).
(9) Remove the nut (54), bolt (51), spacer (53) and clip (52) from the bracket (55).
(10) Remove the three bolts (15) which attach the tube (14) to the scavenge oil pump.
(11) Drain the oil into the CONTAINER 5 L (1.32 USGAL).
(12) Remove the tube (14) from below the angle gearbox support (22).
(13) Remove and discard the packing (16).

END OF POST SBE 79-0056

Subtask 79-22-41-020-053-A ** ON A/C NOT FOR ALL

G. Disconnect the adapter (33) from the angle gearbox (23)

Scavenge Oil Pump and Scavenge Oil Tubes ** ON A/C NOT FOR ALL

PRE SB 70-0950
(1) Remove the two nuts (28) and the two washers (29) that attach the adapter (33) to the angle gearbox (23).

END OF PRE SB 70-0950

POST SB 70-0950
(2) Remove the two bolts (28) and the two washers (29) that attach the adapter (33) to the angle gearbox (23).

END OF POST SB 70-0950
(3) Disconnect the adapter (33) from the angle gearbox (23) and move it along the tube.

Subtask 79-22-41-020-054-A ** ON A/C NOT FOR ALL

H. Loosen the bolts (27) and (34) which attach the tubes (30) and (36) to the scavenge oil pump (38)

Scavenge Oil Pump and Scavenge Oil Tubes ** ON A/C NOT FOR ALL

Subtask 79-22-41-020-050-A ** ON A/C NOT FOR ALL

I. Remove the scavenge oil pump

Scavenge Oil Pump and Scavenge Oil Tubes ** ON A/C NOT FOR ALL

WARNING: BE CAREFUL DURING THE REMOVAL OR INSTALLATION OF THE SCAVENGE OIL PUMP. IT WEIGHS APPROXIMATELY 12.22 LBS (5,544 KG). IF IT FALLS, IT CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

CAUTION: HOLD THE WEIGHT OF THE SCAVENGE OIL PUMP DURING THE REMOVAL OF THE NUTS.

CAUTION: MAKE SURE THAT THE SUCTION STRAINER DOES NOT FALL DURING THE REMOVAL OF THE SCAVENGE OIL PUMP.

(1) Remove the four nuts (39) and the four washers (40) which attach the scavenge oil pump (38) to the gearbox casing.
(2) Remove the scavenge oil pump.

CAUTION: USE A TOOL WITH A BLUNT EDGE (FOR EXAMPLE A SMOOTH PUTTY KNIFE) TO SEPARATE THE PUMP FROM THE GEARBOX FLANGE. YOU MUST MAKE SURE THAT YOU DO NOT DAMAGE THE SEALING SURFACES OF THE PUMPS PILOTING DIAMETER.

(a) Remove the scavenge oil pump (38), with the two scavenge tubes (30) and (36) attached, from the gearbox casing.

Subtask 79-22-41-010-052-A ** ON A/C NOT FOR ALL

J. Remove the suction strainer:

Scavenge Oil Pump and Scavenge Oil Tubes ** ON A/C NOT FOR ALL

(1) Remove the suction strainer (42).
(2) Remove and discard the two packings (41).

Subtask 79-22-41-010-053-A ** ON A/C NOT FOR ALL

K. Remove the two tubes (30) and (36) from the scavenge oil pump

Scavenge Oil Pump and Scavenge Oil Tubes ** ON A/C NOT FOR ALL

(1) Remove the bolts (27) and (34) and the washers (26) and (35) which attach the tubes (30) and (36) to the scavenge oil pump (38).
(2) Remove the tubes (30) and (36) from the pump.
(3) Remove and discard the packings (24), (37), (25), (31) and (32).
(4) Put the applicable COVER - BLANKING on all the openings.

Subtask 79-22-41-942-050-A ** ON A/C NOT FOR ALL

L. Remove the container from below the engine

CAUTION: DO NOT PUT OIL THAT HAS BEEN DRAINED FROM THE ENGINE BACK IN TO THE OIL SYSTEM.

(1) Remove the container.
(2) Discard the drained oil.

[Rev.10 from 2021] 2026.04.01 03:40:28 UTC