Flushing of Oil System

TASK 12-13-79-610-005-C
Flushing of Oil System

WARNING: DO NOT REMOVE THE FILLER CAP OF THE OIL TANK IMMEDIATELY AFTER ENGINE OPERATION. LET THE OIL PRESSURE DECREASE FOR A MINIMUM OF 5 MINUTES AFTER THE ENGINE SHUTDOWN. IF YOU OPEN THE FILLER CAP WHEN THERE IS PRESSURE IN THE TANK, THE OIL CAN BURN YOU DANGEROUSLY.

1. Reason for the Job
You must flush the oil system when the oil system is contaminated.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2442)	engine oil

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 12-13-79-610-002-A	Check oil level and replenish Check Pop Out Indicator of EMCD (Electrical Master Chip Detector)
TASK 12-13-79-610-002-A-01	Check oil level and replenish (Pressure Filling)
TASK 12-13-79-610-003-C	Oil Tank Draining
TASK 12-13-79-610-004-C	Draining of the Accessory Drive Section
TASK 71-00-00-710-006-B	Minimum Idle Check
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-B	Closing of the Fan Cowl Doors
TASK 79-00-00-281-002-A	Check of the Electrical Master Chip Detector (EMCD) for Particles

3. Job Set-up
Subtask 12-13-79-941-059-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 12-13-79-010-061-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 12-13-79-170-051-A ** ON A/C NOT FOR ALL

A. Flush the oil system:
(1) Completely drain oil from tank (Ref. AMM TASK 12-13-79-610-003).
(2) Completely drain oil from accessory drive section (Ref. AMM TASK 12-13-79-610-004).
(3) Fill oil system with new engine oil (Material No.CP2442) (Ref. AMM TASK 12-13-79-610-002) .

NOTE: A half full oil tank is sufficient enough to flush the oil system.

Subtask 12-13-79-710-052-A ** ON A/C NOT FOR ALL

B. Operate engine at ground idle for 10 minutes (Ref. AMM TASK 71-00-00-710-006).

Subtask 12-13-79-680-056-A ** ON A/C NOT FOR ALL

C. Drain completely:
(1) Completely drain oil from tank (Ref. AMM TASK 12-13-79-610-003).
(2) Completely drain oil from accessory drive section (Ref. AMM TASK 12-13-79-610-004).

Subtask 12-13-79-210-057-A ** ON A/C NOT FOR ALL

D. Examine the magnetic chip detector, the scavenge screens and the supply filter. If deposits are normal (non-metallic chips), clean and install. If deposits are abnormal (metal chips), do the AMM task (Ref. AMM TASK 79-00-00-281-002).

Subtask 12-13-79-612-056-A ** ON A/C NOT FOR ALL

E. Fill oil system with new engine oil (Material No.CP2442) (Ref. AMM TASK 12-13-79-610-002).

Subtask 12-13-79-710-053-A ** ON A/C NOT FOR ALL

F. Operate engine at ground idle for 10 minutes (Ref. AMM TASK 71-00-00-710-006).

Subtask 12-13-79-210-058-A ** ON A/C NOT FOR ALL

G. Check for undesirable products in oil by sight and by smell. If a contamination of oil is suspected, repeat steps 4.C. through 4.G.

Subtask 12-13-79-160-052-A ** ON A/C NOT FOR ALL

H. Remove, clean and install magnetic chip detector and supply filter.

Subtask 12-13-79-210-059-A ** ON A/C NOT FOR ALL

I. Check oil level within 30 minutes after shutdown.

Subtask 12-13-79-612-057-A ** ON A/C NOT FOR ALL

J. Fill oil tank to maximum level (Ref. AMM TASK 12-13-79-610-002).

5. Close-up
Subtask 12-13-79-410-061-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowl doors: (Ref. AMM TASK 71-13-00-410-040)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.03.31 22:55:27 UTC