Removal of the Main Fuel Filter Housing [CFML]

TASK 73-11-10-000-803-A
Removal of the Main Fuel Filter Housing

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.

ZONE: 210
ZONE: 400

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)-ADJUSTABLE
No specific	AR	CAP - PROTECTION
No specific	AR	COVER - PROTECTION
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
400	POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
TASK 73-11-10-000-802-A	Removal of the Fuel Filter Cartridge
TASK 73-34-05-000-801-A	Removal of the Fuel Filter Differential Pressure Sensor
CMM 731110
Main Fuel Filter Housing

3. Job Set-up
Subtask 73-11-10-941-072-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) Put WARNING NOTICE(S) in position to tell persons not to operate:

The ENG/MODE selector switch, and
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) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).

Subtask 73-11-10-010-082-A

B. Get Access
(1) Open the fan cowl doors (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) Put an ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE in position.

4. Procedure

WARNING: WHEN YOU USE ENGINE FUEL, USE PERSONAL PROTECTION EQUIPMENT AND DO IT IN A WELL-VENTILATED AREA. ENGINE FUEL IS TOXIC.

WARNING: DO NOT GET FUEL IN YOUR MOUTH, EYES OR ON YOUR SKIN. DO NOT BREATHE THE FUMES FROM THE FUEL. KEEP THE FUEL AWAY FROM SPARKS, FLAME AND HEAT. FUEL IS POISONOUS AND FLAMMABLE, WHICH CAN CAUSE INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.

Subtask 73-11-10-020-077-A

A. Removal of the Main Fuel Filter Housing

NOTE: Make sure that the container is present to avoid fuel leakage on the floor.

(1) Remove the fuel filter differential pressure sensor (2) (Ref. AMM TASK 73-34-05-000-801).
(2) Remove the fuel filter cartridge (Ref. AMM TASK 73-11-10-000-802).
(3) Disconnection of the fuel tube (3) from the main fuel filter housing (1):
(a) Remove the four bolts (4) from the fuel tube (3).
(b) Disconnect the fuel tube (3) from the main fuel filter housing (1).
(c) Remove and discard the gasket (5) of the fuel tube (3).
(4) Disconnection of the fuel tube (6) from the main fuel filter housing (1):
(a) Remove the four bolts (7) from the fuel tube (6).
(b) Disconnect the fuel tube (6) from the main fuel filter housing (1).
(c) Remove and discard the gasket (8) of the fuel tube (6).
(5) Disconnection of the fuel tube (9) from the main fuel filter housing (1):
(a) Remove the four bolts (10) from the fuel tube (9).
(b) Disconnect the fuel tube (9) from the main fuel filter housing (1).
(c) Remove and discard the gasket (11) of the fuel tube (9).
(6) Remove the four bolts (12) and the four washers (13) that attach the main fuel filter housing (1) to the two mounting brackets (14).
(7) Install the COVER - PROTECTION and CAP - PROTECTION on all the open ports, tubes, hoses and disconnected connectors.
(8) In the instance of shipping or prolonged storage, preserve the main fuel filter housing (1) per the CMM 731110.

[Rev.10 from 2021] 2026.04.01 03:03:54 UTC