- install a new fuel filter element (Ref. AMM TASK 73-11-10-400-004).
(c) If the fault continues:
- replace the SW-FUEL FILTER DIFF PRESS (4000EL) (Ref. AMM TASK 73-34-15-000-041) and (Ref. AMM TASK 73-34-15-400-041).
(d) If the fault continues:
- check the wiring between the fuel filter differential pressure switch 4000EL and SDAC1/SDAC2 for a short to ground (Ref. ASM 73-34/02),
- repair or replace wiring as required.
R (e) If the fault continues:
R - replace SDAC-1 (1WV1) (Ref. AMM TASK 31-55-34-000-001) and
R (Ref. AMM TASK 31-55-34-400-001)
R (f) If the fault continues:
R - replace SDAC-2 (1WV2) (Ref. AMM TASK 31-55-34-000-001) and
R (Ref. AMM TASK 31-55-34-400-001)
B. If there are no messages with the DMC3 switched on:
(1) Replace the DMC-1 (1WT1) for the upper ECAM display unit and/or the DMC-2 (1WT2) for the lower ECAM display unit (Ref. AMM TASK 31-63-34-000-001) and (Ref. AMM TASK 31-63-34-400-001).
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(1) No additional maintenance action is required if the fault is not confirmed.
(2) Repeat the fault isolation procedure if the fault continues.
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R TASK 73-00-00-810-920
R Engine 1 does not stop during shut down sequence with FIRE Pushbutton Switch
R 1. Possible Causes_______________
R - Actuator-LP Fuel Valve (9QG)
R - LP Fuel Valve (12QM)
R - Check Valve (122QM)
R - aircraft wiring
R - FIRE Pushbutton Switch (ENG/APU Fire Panel 1WD)
R 2. Job Set-up Information______________________
R A. Referenced Information
R -------------------------------------------------------------------------------R REFERENCE DESIGNATION R -------------------------------------------------------------------------------
R AMM 26-12-12-000-003 R R AMM 26-12-12-400-003 R R AMM 28-16-00-710-002 R R AMM 28-16-42-000-001 R AMM 28-16-42-400-001 R AMM 28-24-41-000-001 R AMM 28-24-41-400-001 R AMM 28-24-51-000-001 R AMM 28-24-51-400-001 R ASM 28-24/00
R 3. Fault Confirmation
__________________
R A. Test Removal of the FIRE Pushbutton Switch (ENG/APU Fire Panel 1WD) Installation of the FIRE Pushbutton Switch (ENG/APU Fire Panel 1WD) Operational Check of Pylon Check Valve to Ensure Valve not Failed Open Removal of the Fuel Recirculation Check-valve Installation of the Fuel Recirculation Check-valve Removal of the LP Fuel Valve 12QM(13QM) Installation of the LP Fuel Valve 12QM(13QM) Removal of the LP Fuel Valve Actuator Installation of the LP Fuel Valve Actuator
R (1) Not applicable, the fault is evident.
R 4. Fault Isolation
_______________
R A. If the fault symptom is identified by the crew observation "ENG 1 -R During ENG shut down sequence with FIRE P/B: ENG DOES NOT STOP"
R - disconnect the connectors AA and BB from Actuator-LP Fuel Valve (9QG)
R and make sure that, when the Fire push button is pushed, there is 28
R VDC at pins C of the connectors AA and BB:
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R (1) If there is 28VDC:
R - replace the Actuator-LP Fuel Valve (9QG) (Ref. AMM TASK 28-24-51-
R 000-001) and (Ref. AMM TASK 28-24-51-400-001)
R (a) If the fault continues, replace the LP Fuel Valve (12QM) (Ref.
R AMM TASK 28-24-41-000-001) and (Ref. AMM TASK 28-24-41-400-001)
R (b) If the fault continues, do an operational check of the Check
R Valve (Ref. AMM TASK 28-16-00-710-002):
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