Removal of the Fuel Return Valve Hose [CFMI]

TASK 73-11-48-000-040-A
Removal of the Fuel Return Valve 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	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 71-13-00-010-040-A	Opening of the Fan Cowl Doors
Fuel/Return Bypass Valve Hose

3. Job Set-up
Subtask 73-11-48-941-053-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 73-11-48-010-053-A ** ON A/C NOT FOR ALL

B. 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 73-11-48-020-051-A ** ON A/C NOT FOR ALL

A. Removal of the Fuel/Return Bypass Valve Hose
(1) Put a CONTAINER 20 L - SHALLOW near the fuel/return bypass valve (15) to catch the drained fuel.
(2) Disconnect the hose (5) from the fuel/return bypass valve (15). Let the fuel drain into the container.
(3) Cut and remove the lockwire from the bolts (35).
(4) Remove the bolts (35) and the washers (40), that attach the hose (5) to the fluid disconnect panel.
(5) Remove and Discard the gasket (30).
(6) Remove the screw (20), washer (25) and clamp (10) that attach the fuel/return bypass valve hose (5) to the bracket at flange Sta. 176.
(7) Remove the screws (20), washers (25) and clamps (10) that attach the fuel/return bypass valve hose (5) to the brackets at flange Sta. 170. (Two location).
(8) Remove the clamps (10) from the hose (5).
(9) Put COVER - PROTECTION on the two ends of the hose (5), the fluid disconnect panel, and the fuel/return bypass valve.

[Rev.10 from 2021] 2026.04.01 02:55:36 UTC