Leak check of the Fuel Return Valve. [CFMI]

TASK 73-11-50-360-001-A-01
Leak check 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	PLIERS - JAWED, PADDED
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 71-00-00-710-006-A	Minimum Idle Check
TASK 71-00-00-710-028-A	Engine Shutdown
TASK 71-13-00-010-040-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-A	Closing of the Fan Cowl Doors
Connection/Disconnection of Oil Temperature Sensor Connector Sensor

3. Job Set-up
Subtask 73-11-50-941-053-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 73-11-50-010-054-A ** ON A/C NOT FOR ALL

B. Open the fan cowl doors: (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 73-11-50-480-052-A ** ON A/C NOT FOR ALL

A. Disconnect the J13 harness electrical connector from the oil temperature sensor (100).

NOTE: The ECU energizes the FRV solenoid valve when the electrical connector is disconnected from the oil temperature sensor (Fail-safe function).

NOTE: Ignore the class 2 message "EOT SENS, J13, ECU"

Subtask 73-11-50-360-053-A ** ON A/C NOT FOR ALL

B. Do the leak check
(1) Perform a minimum idle check (Ref. AMM TASK 71-00-00-710-006).
(2) Make sure that there is no leakage from the FRV tube connections.
(3) Shut down the engine (Ref. AMM TASK 71-00-00-710-028).

Subtask 73-11-50-420-055-A ** ON A/C NOT FOR ALL

C. Connect the J13 harness electrical connector to the oil temperature sensor, tighten connector finger tight plus one eight turn using PLIERS - JAWED, PADDED.

5. Close-up
Subtask 73-11-50-410-054-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowl doors: (Ref. AMM TASK 71-13-00-410-040)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 07:27:12 UTC