W DOC AIRBUS | TSM A320F

Engine 1 does not stop during shut down sequence with FIRE Pushbutton Switch

TASK 73-00-00-810-920-A
Engine 1 does not stop during shut down sequence with FIRE Pushbutton Switch

1. Possible Causes
  • ACTUATOR-LP FUEL VALVE, ENG 1 [9QG]
  • VALVE-LP FUEL, ENG 1 [12QM]
  • CHECK VALVE-FUEL RECIRCULATION, L [122QM]
  • aircraft wiring
  • ENG/APU FIRE PNL [1WD]
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 26-12-12-000-004
Removal of the FIRE Pushbutton Switch (ENG/APU Fire Panel)
AMM 26-12-12-400-004
Installation of the FIRE Pushbutton Switch (ENG/APU Fire Panel)
AMM 28-16-00-710-002
Operational Check of Fuel Recirculation Check Valve to Ensure Valve not Failed Open
AMM 28-16-42-000-001
Removal of the Fuel Recirculation Check-valve
AMM 28-16-42-400-001
Installation of the Fuel Recirculation Check-valve
ASM 282400
AMM 28-24-41-000-001
Removal of the LP Fuel Valve
AMM 28-24-41-400-001
Installation of the LP Fuel Valve
AMM 28-24-51-000-001
Removal of the LP Fuel Valve Actuator
AMM 28-24-51-400-001
Installation of the LP Fuel Valve Actuator
3. Fault Confirmation
Subtask 73-00-00-710-283-A ** ON A/C NOT FOR ALL
A. Test
   (1) Not applicable, the fault is evident.
4. Fault Isolation
Subtask 73-00-00-810-203-C ** ON A/C NOT FOR ALL
A. If the fault symptom is identified by the crew observation "ENG 1 - During ENG shut down sequence with FIRE P/B: ENG DOES NOT STOP"
  • disconnect the connectors AA and BB from Actuator-LP Fuel Valve (9QG) and make sure that, when the Fire push button is pushed, there is 28 VDC at pins C of the connectors AA and BB:
   (1) If there is 28VDC:
     (a) If the fault continues, replace the VALVE-LP FUEL, ENG 1 [12QM] AMM 28-24-41-000-001 and AMM 28-24-41-400-001
     (b) If the fault continues, do an operational check of the Check Valve AMM 28-16-00-710-002:
       1 If the test is correct, no maintenance action is required
       2 If the test is not correct, replace the CHECK VALVE-FUEL RECIRCULATION, L [122QM] AMM 28-16-42-000-001 and AMM 28-16-42-400-001
   (2) If there is no 28VDC:
  • do a check of the aircraft wiring between the Actuator-LP Valve and the ENG Fire panel (1WD) ASM 282400.
     (a) If the wiring is not correct:
  • repair the above defective wirings.
     (b) If the wiring is correct:
Subtask 73-00-00-810-203-D ** ON A/C NOT FOR ALL
A. If the fault symptom is identified by the crew observation "ENG 1 - During ENG shut down sequence with FIRE P/B: ENG DOES NOT STOP"
  • disconnect the connectors AA and BB from Actuator-LP Fuel Valve (9QG) and make sure that, when the Fire push button is pushed, there is 28 VDC at pins C of the connectors AA and BB:
   (1) If there is 28VDC:
     (a) If the fault continues, replace the VALVE-LP FUEL, ENG 1 [12QM] AMM 28-24-41-000-001 and AMM 28-24-41-400-001
     (b) If the fault continues, do an operational check of the Check Valve AMM 28-16-00-710-002:
       1 If the test is correct, no maintenance action is required
       2 If the test is not correct, replace the CHECK VALVE-FUEL RECIRCULATION, L [122QM] AMM 28-16-42-000-001 and AMM 28-16-42-400-001
   (2) If there is no 28VDC:
  • do a check of the aircraft wiring between the Actuator-LP Valve and the ENG Fire panel (1WD) ASM 282400.
     (a) If the wiring is not correct:
  • repair the above defective wirings.
     (b) If the wiring is correct:
[Rev.8 from Aug 2018] 2026.04.04 04:35:12 UTC
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