DOC AIRBUS | TSM A320FFailure of the Starter Shutoff Valve on Engine 1
TASK 80-00-00-810-835-A
Failure of the Starter Shutoff Valve on Engine 1
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 80-00-00-710-121-A ** ON A/C NOT FOR ALL
Subtask 80-00-00-810-096-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:38:38 UTC
Failure of the Starter Shutoff Valve on Engine 1
1. Possible Causes
- aircraft wiring
- EIU-1 [1KS1]
- CTL SW-ENG/MASTER 1 [3KC]
- SEL SW-ENG/MODE/CRANK/AUTO IGN/IGN [6KS]
- ECU [4000KS]
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| ESPM 204521 | |
| 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 73-21-60-000-001 | Removal of the Electronic Control Unit (ECU) |
| AMM 73-21-60-400-001 | Installation of the Electronic Control Unit (ECU) |
| AWM 732509 | |
| AMM 73-25-34-000-040 | Removal of the Engine Interface Unit (EIU) |
| AMM 73-25-34-400-040 | Installation of the Engine Interface Unit (EIU) |
| ASM 743101 |
Subtask 80-00-00-710-121-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 80-00-00-810-096-A ** ON A/C NOT FOR ALL
A. If the fault symptom is identified by the crew observation : ENG1 STARTING - opening of the starter shutoff valve not possible in automatic mode:
(1) Remove the panel 115VU and do a check and repair the aircraft wiring between:
(3) If the fault continues:
Subtask 80-00-00-810-097-A ** ON A/C NOT FOR ALL (1) Remove the panel 115VU and do a check and repair the aircraft wiring between:
- the ENG/MASTER 1 control switch (3KC) and the EIU1 (1KS1), pins AA/5A, 4E to pins 2A, 3A
- the ENG/MODE/CRANK/AUTO IGN/IGN selector switch (6KS) and the EIU1 (1KS1), pins AA/1A, 1B, 1C to pins 2, 3, 4.
(3) If the fault continues:
- replace the EIU-1 [1KS1] AMM 73-25-34-000-040 and AMM 73-25-34-400-040.
- replace the CTL SW-ENG/MASTER 1 [3KC] ESPM 204521
- replace the SEL SW-ENG/MODE/CRANK/AUTO IGN/IGN [6KS] AWM 732509.
- install the panel 115VU and do a test program after removal/installation of a VU panel. AMM 31-10-00-700-001
- replace the ECU [4000KS] AMM 73-21-60-000-001 and AMM 73-21-60-400-001.
B. If the starter shutoff valve does not open in manual mode:
(1) Do a check and repair the aircraft wiring between the ENG/MAN START/1 pushbutton switch (9KS1) and the EIU1 (1KS1), pin AA/1F to pin AA3.
(2) Do a check and repair the aircraft wiring between the EIU1 (1KS1) and the ECU (4000KS) ASM 743101.
(3) If the fault continues:
(5) If the fault continues:
Subtask 80-00-00-710-122-A ** ON A/C NOT FOR ALL (1) Do a check and repair the aircraft wiring between the ENG/MAN START/1 pushbutton switch (9KS1) and the EIU1 (1KS1), pin AA/1F to pin AA3.
(2) Do a check and repair the aircraft wiring between the EIU1 (1KS1) and the ECU (4000KS) ASM 743101.
(3) If the fault continues:
- replace the EIU-1 [1KS1] AMM 73-25-34-000-040 and AMM 73-25-34-400-040.
(5) If the fault continues:
- replace the ECU [4000KS] AMM 73-21-60-000-001 and AMM 73-21-60-400-001.