Removal of the Main Fuel Line from the Pylon to the Fuel Pump [CFML]

TASK 73-11-46-000-802-A
Removal of the Main Fuel Line from the Pylon to the Fuel 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.

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 2M (6 FT)
No specific	AR	CAP - PROTECTION
No specific	1	CONTAINER 5 L (1.32 USGAL)
No specific	AR	COVER - PROTECTION
No specific	AR	WARNING NOTICE(S)

B. 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

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
Main Fuel Line from the Pylon to the Fuel Pump

3. Job Set-up
Subtask 73-11-46-941-054-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 73-11-46-010-058-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 2M (6 FT) in position on the left side of the engine.

4. Procedure
Subtask 73-11-46-020-052-A

A. Removal of the Main Fuel Line from the Pylon to the Fuel Pump

WARNING: BE CAREFUL NOT TO GET AIRCRAFT FUEL IN YOUR MOUTH OR IN YOUR EYES. IF YOU GET FUEL ON YOUR SKIN OR ON YOUR CLOTHES, FLUSH IT IMMEDIATELY WITH WATER. IF NECESSARY, GET MEDICAL HELP. AIRCRAFT FUEL IS POISONOUS.

(1) Put a CONTAINER 5 L (1.32 USGAL) in position below the lower end of the main fuel line (4).
(2) Remove the main fuel line (4) as follows:
(a) Remove the four bolts (14) that attach the main fuel line (4) to the fuel pump (16).
(b) Drain the main fuel line (4) into the container.
(c) Remove the two bolts (11) and the two parts of the clamp (12) at the lower bracket (13).
(d) Remove the two bolts (8) and the two parts of the clamp (9) at the middle bracket (10).
(e) Remove the two bolts (6) and the two parts of the clamp (5) at the upper bracket (7).
(f) Remove the four bolts (3) that attach the main fuel line (4) to the pylon (1).
(g) Remove the main fuel line (4) from the engine.
(h) Remove and discard the gasket (2) at the pylon (1).
(i) Remove and discard the gasket (15) at the fuel pump (16).
(3) Install the COVER - PROTECTION and the CAP - PROTECTION on all the open ports, tubes, hoses and the disconnected connectors.

[Rev.10 from 2021] 2026.04.01 03:04:15 UTC