Loss of Fuel Shut-off Valve Control on Engine 1

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1. Possible Causes
· FMU ( 4000KC )
· CTL SW-ENG/MASTER 1 ( 3KC )
· wiring from the FMU (4000KC) to the ENG/MASTER 1 control switch (3KC)
2 Job Set-up Information
A. Referenced Information
REFERENCE DESIGNATION
Ref. ESPM 20-45-21
Ref. AMM 31-10-00-700-001 Test Program after Removal/Installation of a VU panel
Ref. AMM 71-13-00-010-010 Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
Ref. AMM 71-13-00-410-010 Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
Ref. AMM 73-22-52-000-010 Removal of the Fuel Metering Unit (FMU)
Ref. AMM 73-22-52-400-010 Installation of the Fuel Metering Unit (FMU)
Ref. ASM 76-12-01
3. Fault Confirmation
Subtask 73-00-00-710-239-A
A. Test
Not applicable, the fault is evident.
4. Fault Isolation
Subtask 73-00-00-810-165-A
A. If the fault symptom is identified by the CFDS message FMU/HC/EEC1 and the ECAM warning ENG1
FUEL VALVE FAULT:
· replace the FMU ( 4000KC ) Ref. AMM 73-22-52-000-010 and Ref. AMM 73-22-52-400-010 .
(1) If the fault continues:
· replace the CTL SW-ENG/MASTER 1 ( 3KC ) on the panel 115VU Ref. ESPM 20-45-21.
· install the panel 115VU and do a test program after removal/installation of a VU panel Ref.
AMM 31-10-00-700-001 .
(2) If the fault continues:
· open the fan cowls 447AL and 448AR Ref. AMM 71-13-00-010-010
· do a check and repair the wiring from the FMU (4000KC) to the ENG/MASTER 1 control switch
(3KC)
. pin A/1 to pin 1G
. pin A/2 to the ground Ref. ASM 76-12-01.
5. Close-up
Subtask 73-00-00-860-166-A
A. Put the aircraft back to its initial configuration.
(1) Make sure that the fan cowls 437AL and 438AR are closed Ref. AMM 71-13-00-410-010 . [Rev.6 from Feb 2017] 2026.04.04 04:36:08 UTC