DOC AIRBUS | TSM A320FFailure of the Control of the Fuel Shut-off Valve on Engine 1
TASK 76-12-00-810-814-A
Failure of the Control of the Fuel Shut-off Valve on Engine 1
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 76-12-00-710-074-A ** ON A/C NOT FOR ALL
Subtask 76-12-00-865-054-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:37:27 UTC
Failure of the Control of the Fuel Shut-off Valve on Engine 1
1. Possible Causes
- HMU
- aircraft wiring
- CTL SW-ENG/MASTER 1 [3KC]
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| ESPM 2045210 | |
| AMM 31-10-00-700-001 | Test Program after Removal/Installation of a VU panel |
| AMM 71-00-00-710-003 | Engine Automatic Start |
| AMM 73-21-10-000-001 | Removal of the Hydromechanical Unit (HMU) |
| AMM 73-21-10-000-002 | Removal of the Hydromechanical Unit (HMU) |
| AMM 73-21-10-400-001 | Installation of the Hydromechanical Unit (HMU) |
| AMM 73-21-10-400-002 | Installation of the Hydromechanical Unit (HMU) |
| ASM 761201 | |
| AWM 761201 |
Subtask 76-12-00-710-074-A ** ON A/C NOT FOR ALL
A. Test
(1) Not applicable, the fault is evident.
4. Fault Isolation(1) Not applicable, the fault is evident.
Subtask 76-12-00-865-054-A ** ON A/C NOT FOR ALL
A. Table of the circuit breakers used in this procedure:
Subtask 76-12-00-810-062-B ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | ENGINE/1/HP FUEL SOV | 1KC1 | A01 |
B. If the fault symptom is identified by the CFDS message MASTER LEVER, HMU:
Subtask 76-12-00-810-062-C ** ON A/C NOT FOR ALL NOTE: The fault is generated if there is a demand / position disagree on the HMU HP fuel shut-off valve. While the A/C is electrically powered and the engine master lever is set to OFF.
- disconnect the connector 4000KC-A from the HMU and make sure that, when the ENG/MASTER control switch on the 115VU is in the OFF position, there is 28VDC at pin AA/1 of the connector 4000KC-A ASM 761201 and AWM 761201.
- replace the HMU AMM 73-21-10-000-001 and AMM 73-21-10-400-001.
- remove the panel 115VU.
- do a check of the aircraft wiring between the connector 4000KC-A and the ENG/MASTER control switch (3KC) pin AA/1 to pin 1G.
- do a check of the aircraft wiring between the ENG/MASTER control switch (3KC) pin 3G and the circuit breaker (1KC1) ASM 761201.
- repair the above defective wirings.
- replace the CTL SW-ENG/MASTER 1 [3KC] on the panel 115VU ESPM 2045210 AWM 761201.
- install the panel 115VU and do a test program after removal/installation of a VU panel AMM 31-10-00-700-001.
B. If the fault symptom is identified by the CFDS message MASTER LEVER, HMU:
Subtask 76-12-00-710-075-A ** ON A/C NOT FOR ALL NOTE: The fault is generated if there is a demand / position disagree on the HMU HP fuel shut-off valve. While the A/C is electrically powered and the engine master lever is set to OFF.
- disconnect the connector 4000KC-A from the HMU and make sure that, when the ENG/MASTER control switch on the 115VU is in the OFF position, there is 28VDC at pin AA/1 of the connector 4000KC-A ASM 761201 and AWM 761201.
- replace the HMU AMM 73-21-10-000-002 and AMM 73-21-10-400-002.
- remove the panel 115VU.
- do a check of the aircraft wiring between the connector 4000KC-A and the ENG/MASTER control switch (3KC) pin AA/1 to pin 1G.
- do a check of the aircraft wiring between the ENG/MASTER control switch (3KC) pin 3G and the circuit breaker (1KC1) ASM 761201.
- repair the above defective wirings.
- replace the CTL SW-ENG/MASTER 1 [3KC] on the panel 115VU ESPM 2045210 AWM 761201.
- install the panel 115VU and do a test program after removal/installation of a VU panel AMM 31-10-00-700-001.
C. Test
(1) Start the engine 1 by the engine automatic start procedure AMM 71-00-00-710-003.
(2) Make sure that there is no ECAM and CFDS fault message shown.
(1) Start the engine 1 by the engine automatic start procedure AMM 71-00-00-710-003.
(2) Make sure that there is no ECAM and CFDS fault message shown.