Removal of the Fuel Return Valve [CFMI]

TASK 73-11-50-000-001-A
Removal of the Fuel Return Valve

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	CAP - BLANKING
No specific	AR	CONTAINER 5 L (1.32 USGAL)
No specific	AR	PLUG - BLANKING
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 71-13-00-010-040-A	Opening of the Fan Cowl Doors
Removal/Installation of the Fuel Return Valve

3. Job Set-up
Subtask 73-11-50-941-051-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 73-11-50-861-050-A ** ON A/C NOT FOR ALL

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

Subtask 73-11-50-865-051-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 73-11-50-010-051-A ** ON A/C NOT FOR ALL

D. Make sure that the fan cowl doors are open: (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 73-11-50-020-052-A ** ON A/C NOT FOR ALL

A. Removal of the Fuel Return Valve:

CAUTION: INSTALL CAPS AND PLUGS ON THE ORIFICES OF ALL DISCONNECTED PIPES AND PARTS FOR THEIR PROTECTION AGAINST CONTAMINATION BY UNWANTED MATERIALS.

CAUTION: USE TWO WRENCHES TO REMOVE OR INSTALL THE TUBE COUPLING NUTS:

ONE WRENCH TO HOLD THE UNION, AND
ONE TO LOOSEN OR TIGHTEN THE COUPLING NUT.

THIS PREVENTS DAMAGE TO THE PARTS.

(1) Install a CONTAINER 5 L (1.32 USGAL) under the fuel return valve and drain fuel remaining in the fuel return hose (10) by loosening coupling nut.
(2) Remove the three clamps securing the fuel return hose (10) to the fan frame brackets.
(3) Disconnect the fuel tubes:
(a) Fuel return hose (10).
(b) Fuel pump LP tube (20).
(c) Fuel pump HP tube (50).
(d) IDG cooler tube (40).
(e) Shut-off signal tube (80).
(4) Disconnect the electrical connectors J7 (70) and J8 (60).

Subtask 73-11-50-020-050-A ** ON A/C NOT FOR ALL

B. Remove the 3 bolts (30) which attach the fuel return valve (90), and remove the valve (90).

CAUTION: TAKE CARE DURING REMOVAL OF THE FUEL RETURN VALVE NOT TO DAMAGE THE NIPPLES.

(1) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(2) Put PLUG - BLANKING and CAP - BLANKING on fuel return valve and disconnected fuel tubes.

[Rev.10 from 2021] 2026.04.01 02:55:43 UTC