W DOC AIRBUS | TSM A320F

Fuel-Crossfeed Valve P/BSW-4QE, ON and/or OPEN legends do not come on

TASK 28-23-00-810-802-A
Fuel-Crossfeed Valve P/BSW-4QE, ON and/or OPEN legends do not come on

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
  • ON indicator light (lamp/filament/bulb)
  • P/BSW-FUEL/X FEED [4QE]
  • ACTUATOR-FUEL CROSSFEED VALVE [5QE]
  • OPEN indicator light (lamp/filament/bulb)
  • BOARD-ANN LT TEST & INTFC [6LP]
  • aircraft wiring
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
TSM TASK 28-23-00-810-801-A
Fuel-Crossfeed Valve Does Not Open (Close) or Opens (Closes) Slowly
ESPM 2052210
ESPM 2053210
AMM 24-41-00-861-002
Energize the Aircraft Electrical Circuits from the External Power
AMM 24-41-00-862-002
De-energize the Aircraft Electrical Circuits Supplied from the External Power
AWM 249107
ASM 281301
ASM 282301
AWM 282301
AMM 28-23-51-000-001
Removal of the Crossfeed Valve Actuator
AMM 28-23-51-400-001
Installation of the Crossfeed Valve Actuator
AMM 31-60-00-860-001
EIS Start Procedure
AMM 31-60-00-860-002
EIS Stop Procedure
AMM 33-14-00-710-001
Operational Test of the Lights
AMM 33-14-33-000-001
Removal of the Annunciator-Light Test and Interface-Board
AMM 33-14-33-400-001
Installation of the Annunciator-Light Test and Interface-Board
3. Fault Confirmation
Subtask 28-23-00-700-051-A
A. Test
   (1) Energize the aircraft electrical circuits AMM 24-41-00-861-002.
   (2) Do the EIS start procedure (ECAM only) AMM 31-60-00-860-001.
   (3) At the ECAM control panel (11VU) push (in) the FUEL P/BSW.
     (a) Make sure that the FUEL page is shown on the ECAM system (lower) display page.
   (4) At the fuel panel (40VU), push (in) the P/BSW-FUEL/X FEED (4QE).
   (5) If the crossfeed valve P/BSW-4QE:
     (a) ON legend (white) and OPEN legend (green) come on and the valve symbol on the FUEL page is green in-line (there is no fault), do Para. 4.A.(4).
     (b) ON legend (white) does not come on, do Para. 4.A. step (1).
     (c) OPEN legend (green) does not come on and the valve symbol shows amber cross-line on the ECAM FUEL page, do Para. 4.A. step (2).
     (d) OPEN legend (green) does not come on but the valve symbol shows green in-line on the ECAM FUEL page, do Para. 4.A. step (3).
4. Fault Isolation
Subtask 28-23-00-810-051-A
A. Procedure
   (1) The ON legend (white) does not come on
     (a) Do the procedure for the operational test of the annunciator light test system in the cockpit AMM 33-14-00-710-001.
       1 If the ON legend light does not come on, replace the ON indicator light (lamp/filament/bulb).
     (b) If the fault continues:
       1 Do a check ASM 282301 of the P/BSW-FUEL/X FEED [4QE] and if necessary replace it.
       2 Do a check ESPM 2052210 of the aircraft wiring between the P/BSW-FUEL/X FEED (4QE) terminal C1 and the panel 40VU ground point ASM 282301 AWM 282301 and AWM 249107.
       3 Repair all the unserviceable wiring and connectors ESPM 2053210.
     (c) Do the test given in Para. 3.A.
   (2) The OPEN legend (green) does not come on and the valve symbol shows amber cross-line on the ECAM FUEL page
     (a) Do a check of the actuator crossfeed valve 5QE see/feel indicator to see if it shows open or closed.
     (b) If the actuator crossfeed valve 5QE see/feel indicator:

     (c) Replace the ACTUATOR-FUEL CROSSFEED VALVE [5QE] AMM 28-23-51-000-001 and AMM 28-23-51-400-001.
NOTE: This step is necessary because although the actuator crossfeed valve 5QE see/feel indicator has moved to the open position, the internal position indication microswitch (SHUT/OPEN contacts between pins D and E of connector 5QE-A) and/or the related wiring can be unserviceable.
     (d) Do the test given in Para. 3.A.
   (3) The OPEN legend (green) does not come on but the valve symbol shows green in-line on the ECAM FUEL page
     (a) Do the procedure for the operational test of the annunciator light test system in the cockpit AMM 33-14-00-710-001.
       1 If the OPEN legend light does not come on, replace the OPEN indicator light (lamp/filament/bulb).
     (b) If the fault continues:
       1 Do a check ASM 282301 of the P/BSW-FUEL/X FEED [4QE] and if necessary replace it.
       2 Replace the BOARD-ANN LT TEST & INTFC [6LP] AMM 33-14-33-000-001 and AMM 33-14-33-400-001.
       3 Do a check ESPM 2052210 of the aircraft wiring ASM 281301 between:
  • the connector 5QE-A, pin D and the BOARD-ANN LT TEST & INTFC connector 6LP-A, pin 9
  • the BOARD-ANN LT TEST & INTFC connector 6LP-A, pin 44 and the P/BSW-FUEL/X FEED (4QE), terminal 7.
       4 Repair all the unserviceable wiring and connectors ESPM 2053210.
     (c) Do the test given in Para. 3.A.
   (4) At the fuel panel (40VU), release (out) the P/BSW-FUEL/X FEED (4QE).
     (a) Make sure that the P/BSW:
  • ON legend is off
  • OPEN legend is off.
     (b) Make sure that the crossfeed valve symbol shows green cross-line.
   (5) Do the EIS stop procedure (ECAM only) AMM 31-60-00-860-002.
   (6) If necessary, de-energize the aircraft electrical circuits AMM 24-41-00-862-002.
5. Close-up
Subtask 28-23-00-860-052-A
A. Close Access
   (1) Put the aircraft back to its initial or required configuration.
   (2) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
[Rev.8 from Aug 2018] 2026.04.04 04:39:36 UTC
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