W DOC AIRBUS | TSM A320F

Refuel Valve Fails To Close On The Completion of a Refuel

TASK 28-25-00-810-801-A
Refuel Valve Fails To Close On The Completion of a Refuel

WARNING: OBEY THE FUEL SAFETY PROCEDURES.
CAUTION: DO NOT LET THE REFUEL PRESSURE BE MORE THAN THE MAXIMUM SAFE PRESSURE OF 50psi (3.45bar).
1. Possible Causes
  • aircraft wiring
  • refuel valve solenoid
  • VALVE-REFUEL, L WING TK [7QU]
  • VALVE-REFUEL, R WING TK [8QU]
  • VALVE-REFUEL, CTR TK [10QU]
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
AR
MULTIMETER - STANDARD
 B. Referenced Information
REFERENCE
DESIGNATION
ESPM 2053210
AMM 28-25-00-710-003
Operational Test of the Refuel System
ASM 282501
AMM 28-25-51-000-001
Removal of the Refuel Valve
AMM 28-25-51-000-002
Removal of the Refuel Valve
AMM 28-25-51-000-003
Removal of the Solenoid Valve
AMM 28-25-51-400-001
Installation of the Refuel Valve
AMM 28-25-51-400-002
Installation of the Refuel Valve
AMM 28-25-51-400-003
Installation of the Solenoid Valve
3. Fault Confirmation
Subtask 28-25-00-710-050-A
A. Test
   (1) Not applicable, the fault is evident. Do the fault isolation.
4. Fault Isolation
Subtask 28-25-00-810-050-A
A. Procedure
NOTE: If the fuel tanker or fuel hydrant hose end pressure is more than the maximum safe pressure it can cause:
  • a refuel valve that has been commanded to shut, to be held open
  • damage to the refuel gallery.
   (1) Do a check of the fuel tanker or fuel hydrant hose end pressure.
   (2) If the fuel pressure is more than 50psi (3.45bar):
  • change the fuel pressure if possible or
  • get another source of fuel supplied at the correct pressure.
   (3) If the fault continues:
  • disconnect the electrical supply connector from the related refuel-valve.
   (4) Do a test, with a MULTIMETER - STANDARD, to see if 28VDC is between pin A (+) and pin C (-).
  • If there is 28VDC, do step (5)
  • If there is not 28VDC, do step (6).
   (5) Do a check of the related aircraft wiring ASM 282501 (to locate the source of the 28VDC) between:
  • the refuel valve electrical supply connector, pin A and the RELAY/REFUEL-VALVE CONTROL, terminal A2.
     (a) Repair all unserviceable wiring and connectors ESPM 2053210.
     (b) Do the operational test of the refuel system AMM 28-25-00-710-003, or continue the refuel.
   (6) Replace the related refuel valve solenoid AMM 28-25-51-000-003 and AMM 28-25-51-400-003.
     (a) If the fault continues, replace the applicable:
     (b) Do the operational test of the refuel system AMM 28-25-00-710-003, or continue the refuel.
[Rev.8 from Aug 2018] 2026.04.04 04:28:42 UTC
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