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Fuel LP Valve Engine 1 Status Is Not Available On The ECAM System FUEL Page

TASK 28-24-00-810-804-A
Fuel LP Valve Engine 1 Status Is Not Available On The ECAM System FUEL Page

WARNING: OBEY THE FUEL SAFETY PROCEDURES.
WARNING: WHEN YOU DO WORK ON THE FUEL SYSTEM WIRING, YOU MUST USE TEST EQUIPMENT THAT IS APPROVED (REFER TO INTERNATIONAL OR NATIONAL SPECIFICATIONS FOR INTRINSICALLY SAFE TEST EQUIPMENT: EN50020, UL913 OR EQUIVALENT). TEST EQUIPMENT THAT IS NOT APPROVED CAN CAUSE FIRE OR AN EXPLOSION.
1. Possible Causes
  • aircraft wiring
  • ACTUATOR-LP FUEL VALVE, ENG 1 [9QG]
  • SDAC-1 [1WV1]
  • SDAC-2 [1WV2]
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
TSM TASK 28-24-00-810-801-A
Fuel LP Fuel Valve Engine 1 Does Not Open
TSM TASK 28-24-00-810-802-A
Fuel LP Fuel Valve Engine 1 Does Not Close
ESPM 2053210
AMM 26-12-00-00-
AMM 26-21-00-00-
ASM 262102
AMM 28-24-00-00-
AMM 28-24-00-720-001
Functional Test of the LP Fuel Shut Off Valves
ASM 282401
AWM 282401
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
AWM 315477
AMM 31-55-34-000-001
Removal of the SDAC
AMM 31-55-34-400-001
Installation of the SDAC
AMM 76-12-00-00-
ASM 761201
TSM TASK 28-24-00-03
ENGINE LP FUEL SHUT OFF - TASK SUPPORTING DATA
3. Fault Confirmation
Subtask 28-24-00-720-053-A
A. Test
   (1) At the overhead panel 20VU, and on the ENG/APU FIRE PANEL 1WD, make sure that the ENG 1 FIRE PUSH pushbutton switch is in the closed and guarded position.
   (2) Get the Functional Test of the LP Fuel Shut Off Valves AMM 28-24-00-720-001.
     (a) Do the job set-up and the parts of the test applicable to the ENG 1 LP valve 12QM.
       1 If the test of the ENG 1 LP fuel valve 12QM:

  • operates as specified, no troubleshooting work steps are necessary

  • shows that it does not open, do the TSM procedure (Ref. TSM TASK 28-24-00-810-801)

  • shows that it does not close, do the TSM procedure (Ref. TSM TASK 28-24-00-810-802)

  • movements are correct but the related symbol indications (on the ECAM system FUEL page) are not correct, do Para. 4.A.
NOTE: You can get more data from the:
4. Fault Isolation
Subtask 28-24-00-810-053-A
A. Procedure
   (1) Set the ENG/MASTER 1 (3KC) switch (on the panel 115VU) to OFF.
   (2) Disconnect the connector 9QG-A from the ACTUATOR-LP FUEL VALVE, ENG 1 (9QG).
   (3) Examine the ENG 1 LP fuel valve symbol on the ECAM system FUEL page.
     (a) If the ENG 1 LP fuel valve symbol:

  • shows in transit (a diagonal amber line), do step (4)

  • does not show in transit, do step (7).
   (4) Do the check that follows:
     (a) Temporarily put a ground on the connector 9QG-A, pin B.
       1 Examine the ENG 1 LP fuel valve symbol on the ECAM system FUEL page and make a record of the symbol shown.
       2 Remove the ground temporarily put on the connector 9QG-A, pin B.
     (b) Temporarily put a ground on the connector 9QG-A, pin D.
       1 Examine the ENG 1 LP fuel valve symbol on the ECAM system FUEL page and make a record of the symbol shown.
       2 Remove the ground temporarily put on the connector 9QG-A, pin D.
     (c) Compare the records of the checks in the steps (a) and (b) with the table that follows:

THE GROUNDED PIN OF CONNECTOR 9QG-A
ENG 1 LP FUEL VALVE SYMBOL
B
AMBER CROSS LINE = CLOSED
D
AMBER IN LINE = OPEN
       1 If the records of the ENG 1 LP fuel valve symbols shown:

  • agrees with that shown in the table, do step (5)

  • does not agree with that shown in the table, do step (7).
   (5) Do a check of the aircraft wiring AWM 282401 between the ACTUATOR-LP FUEL VALVE, ENG 1 connector 9QG-A, pin E and the ground point 4001VN(521STA332).
     (a) Repair all the unserviceable wiring and connectors ESPM 2053210.
     (b) Connect the connector 9QG-A to the ACTUATOR-LP FUEL VALVE, ENG 1 (9QG).
     (c) Do the test given in Para, 3.A.
   (6) If the fault continues:
     (a) Replace the ACTUATOR-LP FUEL VALVE, ENG 1 [9QG] AMM 28-24-51-000-001 and AMM 28-24-51-400-001.
     (b) Do the test given in Para. 3.A.
   (7) If the fault continues (the symbol does not show in transit in step (3) or it does not agree with the table given in step (4)).
     (a) Do a check of the aircraft wiring AWM 315477 between:
  • the ACTUATOR-LP FUEL VALVE, ENG 1 connector 9QG-A, pin B and the SDAC-1 (1WV-1) connector AA, pin 2C (closed signal wire/SDAC-1)
  • the ACTUATOR-LP FUEL VALVE, ENG 1 connector 9QG-A, pin D and the SDAC-1 (1WV-1) connector AA, pin 1C (open signal wire/SDAC-1)
  • the ACTUATOR-LP FUEL VALVE, ENG 1 connector 9QG-A, pin B and the SDAC-2 (1WV-2) connector AA, pin 2C (closed signal wire/SDAC-2)
  • the ACTUATOR-LP FUEL VALVE, ENG 1 connector 9QG-A, pin D and the SDAC-2 (1WV-2) connector AA, pin 1C (open signal wire/SDAC-2).
     (b) Repair all the unserviceable wiring and connectors ESPM 2053210.
     (c) Do the test given in Para. 3.A.
   (8) If the fault continues:
     (a) Open the C/Bs 3WV (SDAC1) and 2WV (SDAC2) in turn:
     (b) If the fault is displayed on the powered (or the active) SDAC, swap (interchange) the SDACs to confirm the faulty LRU.
     (c) Replace the SDAC-1 [1WV1] or SDAC-2 [1WV2] AMM 31-55-34-000-001 and AMM 31-55-34-400-001 that causes the incorrect ENG 1 LP fuel valve symbol to be shown on the ECAM system FUEL page.
     (d) Connect the connector 9QG-A to the ACTUATOR-LP FUEL VALVE, ENG 1 (9QG).
     (e) Do the test given in Para. 3.A.
   (9) If the fault continues:
     (a) Remove the SDAC-1 [1WV1] AMM 31-55-34-000-001.
     (b) On the FUEL page, do a check of the ENG 1 LP VALVE symbol.
     (c) If the ENG 1 LP VALVE symbol does not display correctly, replace the SDAC-1 [1WV1] AMM 31-55-34-000-001 and AMM 31-55-34-400-001.
     (d) Do the test given in Para. 3.A.
[Rev.8 from Aug 2018] 2026.04.04 04:28:41 UTC
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