Replacement of the O-ring of the Oil Tank Filler Cap. [CFMI]

TASK 79-11-10-300-005-A
Replacement of the O-ring of the Oil Tank Filler Cap.

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	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. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
30	O-RING	AIPC 79-11-10-01-170

E. Referenced Information

REFERENCE	DESIGNATION
TASK 12-13-79-610-001-A	Check Oil Level and Replenish
TASK 12-13-79-610-001-A-01	Check Oil Level and Replenish (Pressure Filling)
TASK 71-13-00-010-040-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-A	Closing of the Fan Cowl Doors
Replacement of the Damaged O-ring of the Oil Tank Filler Cap (PRE CFM SB 79-0026)
Replacement of the Damaged O-ring of the Oil Tank Filler Cap (POST CFM SB 79-0026)

3. Job Set-up
Subtask 79-11-10-941-052-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 79-11-10-010-052-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 79-11-10-020-051-A ** ON A/C NOT FOR ALL

A. Removal of the Damaged O-ring from the Oil Tank Filler Cap.
(1) Remove the oil tank filler cap (10) (Ref. AMM TASK 12-13-79-610-001).
(2) Disengage the split ring (20) from the oil tank filler cap (10) to release the chain (40).
(3) Remove and discard the O-ring (30).

Subtask 79-11-10-420-051-A ** ON A/C NOT FOR ALL

B. Installation of the new O-ring on the oil tank filler cap.

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

CAUTION: BE CAREFUL DO NOT INTERMIX THE PARTS PRE CFM SB 79-0026 AND POST CFM SB 79-0026 BECAUSE THEY ARE NOT INTERCHANGEABLE.

(1) Lubricate the new o-ring (30) with engine oil (Material No.CP2442) .
(2) Install the new AIPC 79-11-10-01-170 O-RING (30) in the groove of the filler cap (10).
(3) Install the split ring (20) on the oil tank filler cap (10) to attach the chain (40).
(4) Install and lock the oil tank filler cap (10). (Ref. AMM TASK 12-13-79-610-001).

5. Close-up
Subtask 79-11-10-410-052-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] 2026.04.01 13:13:54 UTC