Installation of the Fuel Filter Cartridge [CFML]

TASK 73-11-10-400-802-A
Installation of the Fuel Filter Cartridge

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: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

NOTE: After the replacement of the fuel filter on one engine, we recommend to wait at least 3 flights before the replacement on the other engine. Unless if an alert asks for its replacement before.

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 1M(3 FT)
No specific	1	FLASHLIGHT
No specific	1	MIRROR - INSPECTION
No specific	AR	WARNING NOTICE(S)
No specific	1	WRENCH - TORQUE

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2442)	engine oil
(Material No.CP5070)	vaseline
(Material No.CP8001)	lockwire 0.032 in. (0.8 mm) dia.

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
1	FUEL FILTER CARTRIDGE	EIPC 73-11-10-01-060
10	BOWL BACK-UP RING	EIPC 73-11-10-01-070
9	BOWL BACK-UP RING	EIPC 73-11-10-01-070
8	O-RING	EIPC 73-11-10-01-080

E. Referenced Information

REFERENCE	DESIGNATION
TASK 71-00-00-700-805-A	Dry-Motoring Check
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-803-A	Closing of the Fan Cowl Doors
Fuel Filter Cartridge

3. Job Set-up
Subtask 73-11-10-941-069-A

A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Make sure that the WARNING NOTICE(S) are in position to tell persons not to operate:

The ENG/MODE selector switch
The ENG/MASTER 1(2) control switch.

(2) On the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Make sure that the WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).

Subtask 73-11-10-010-079-A

B. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(2) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.

4. Procedure
Subtask 73-11-10-420-074-A

A. Installation of the Fuel Filter Cartridge

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

CAUTION: BEFORE YOU INSTALL THE FILTER BOWL, MAKE SURE THAT THE FUEL FILTER BOWL O-RINGS AND BACK-UP RINGS ARE CORRECTLY SEATED AND LUBRICATED. IF THEY ARE NOT, THEY CAN GET DAMAGED. DAMAGED O-RINGS CAN CAUSE FUEL LEAKS AND O-RING DEBRIS CAN GO INTO THE FUEL SYSTEM. THIS CAN CAUSE DAMAGE TO EQUIPMENT DOWNSTREAM AND INCORRECT FUEL FLOW.

(1) Make sure that the mating surfaces are clean and clear of unwanted materials.
(2) Lubricate the new preformed packing (6) and (7), the new EIPC 73-11-10-01-080 O-RING (8) and the new EIPC 73-11-10-01-070 BOWL BACK-UP RING (9) and the new EIPC 73-11-10-01-070 BOWL BACK-UP RING (10) with vaseline (Material No.CP5070) .

NOTE: The preformed packings (6) and (7) are included in the fuel filter cartridge. They can be removed and installed again to help with lubrication.

(3) Install the new EIPC 73-11-10-01-080 O-RING (8) with the new EIPC 73-11-10-01-070 BOWL BACK-UP RING (10) and the new EIPC 73-11-10-01-070 BOWL BACK-UP RING (9) in groove of the fuel filter housing (2).
(4) Visually ensure the O-ring and back-up rings are fully seated in the fuel filter housing (2) groove before proceeding with filter bowl (4) installation. An MIRROR - INSPECTION and a FLASHLIGHT can help to view if the O-rings and back-up rings are properly seated.
(5) Install the EIPC 73-11-10-01-060 FUEL FILTER CARTRIDGE (1) in the fuel filter bowl (4).

NOTE: It is acceptable to install the filter cartridge into either the main fuel filter housing (2) or bowl (4).

(6) Verify that the latch (5) is in the open position.
(7) Lubricate the upper non-threaded section of the fuel filter bowl (4) with vaseline (Material No.CP5070) and the threads of the fuel filter bowl (4) with engine oil (Material No.CP2442) .
(8) Tighten the bowl:

CAUTION: DO NOT APPLY TOO MUCH TORQUE TO THE BOWL. IF YOU DO, YOU CAN CAUSE DAMAGE TO THE BOWL.

(a) Install the fuel filter bowl (4) on the fuel filter housing (2) and tighten it carefully by hand.
1 If there is a sudden decrease in torque, remove the bowl and do an inspection of the O-ring (8) and bowl back-up rings (9), (10) for damage.

NOTE: A decrease in torque can be accompanied by an audible snap.

2 If you find damage, make sure all debris is removed before you install the new O-ring (8) and bowl back-up rings (9), (10).

NOTE: If there is damage, it is likely that the packing was dislodged from the groove and cut.

(9) Final seating of the fuel filter bowl (4) can be performed using a WRENCH - TORQUE on the filter bowl lower boss if hand torque is not sufficient to seat the bowl (not to exceed 50 lbf.ft (6.78 m.daN). Do not attempt to seat the bowl by applying torque to the drain plug, only apply torque to the bowl boss to seat the filter bowl.

NOTE: The fuel filter bowl (4) can be installed by hand tightening only. However, a WRENCH - TORQUE can be used if the bowl cannot be seated by hand torque alone.

(10) Pull the latch (5) down (in the direction of the filter bowl drain plug) and release it.

NOTE: The latch (5) should return to the closed position and make contact with the fuel filter bowl (4).

NOTE: The latch (5) may sit at any position along the lock ring (either on top of the teeth or in the grooves). Do not tighten or loosen the fuel filter bowl (4) to change the alignment.

(11) Installation of the lockwire

WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.

(a) Install lockwire on filter drain plug if not already installed during filter bowl removal. If lockwire was installed during filter bowl removal ensure it was not damaged during maintenance procedure.
1 Safety the drain plug (3) with CP8001lockwire 0.032 in. (0.8 mm) dia..

Subtask 73-11-10-710-060-A

B. Test

CAUTION: DURING THE DRY MOTORING CHECK, MAKE SURE THAT THERE ARE NO LEAKS AT THE FILTER BOWL. IF THERE ARE LEAKS, IT IS POSSIBLE THAT THE PREFORMED PACKING IS DAMAGED. A DAMAGED PACKING CAN CAUSE DEBRIS TO GO INTO THE FUEL SYSTEM.

(1) Do the dry-motoring check (Ref. AMM TASK 71-00-00-700-805).
(a) If there is a leak, remove the bowl and do an inspection of the O-ring (8) and bowl back-up rings (9), (10).
1 If you find damage, make sure all debris is removed before you install the new O-ring (8) and bowl back-up rings (9), (10).
2 If you cannot remove all of the debris, contact CFM for service recommendation.

5. Close-up
Subtask 73-11-10-410-068-A

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 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 13:06:52 UTC