Removal of the Main Fuel Supply Hose [CFMB]

TASK 73-11-11-000-041-A
Removal of the Main Fuel Supply Hose

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	ACCESS PLATFORM 1M(3 FT)
No specific	1	CONTAINER 20 L - SHALLOW
No specific	AR	COVER - PROTECTION
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

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

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
Main Fuel Supply Hose

3. Job Set-up
Subtask 73-11-11-941-050-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 73-11-11-861-053-A ** ON A/C NOT FOR ALL

B. Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).

Subtask 73-11-11-865-055-A ** ON A/C NOT FOR ALL

C. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
FOR FIN: 1000EM1 (ENGINE1)
49VU	FUEL/LP VALVE/MOT1/ENG1	1QG	A08
121VU	FUEL/LP VALVE/MOT2/ENG1	3QG	M25
FOR FIN: 1000EM2 (ENGINE2)
49VU	FUEL/LP VALVE/MOT1/ENG2	2QG	A09
121VU	FUEL/LP VALVE/MOT2/ENG2	4QG	M26

Subtask 73-11-11-862-053-A ** ON A/C NOT FOR ALL

D. De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

Subtask 73-11-11-010-050-A ** ON A/C NOT FOR ALL

E. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Put the ACCESS PLATFORM 1M(3 FT) in position.

4. Procedure
Subtask 73-11-11-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the Main Fuel Supply Hose
(1) Remove the bolts (5), the washers (15), the nuts (20) and the clamp (10) from the upper bracket.
(2) Remove the bolts (5) and the clamp (10) from the middle bracket.
(3) Remove the bolts (5), the nuts (20) and the clamp (10) from the lower bracket.
(4) Put the CONTAINER 20 L - SHALLOW below the fuel manifold duct to catch the drained fuel.
(5) Cut and remove the lockwire from the bolts (30).
(6) Remove the bolts (30) and the washers (35) that attach the main fuel supply hose (25) to the fuel manifold duct. Let the fuel drain into the container.
(7) Remove the bolts (30) and the washers (35) that attach the hose (25) to the fluid disconnect panel.
(8) Remove and discard the gaskets (40).
(9) Put COVER - PROTECTION on the ends of the hose (25), the fluid disconnect panel and the fuel manifold duct.

[Rev.10 from 2021] 2026.04.01 02:57:38 UTC