W DOC AIRBUS | TSM A320F

Loss of Alternate Braking on the Wheel 1 (Hydraulic Failure)

TASK 32-43-00-810-809-A
Loss of Alternate Braking on the Wheel 1 (Hydraulic Failure)

1. Possible Causes
  • related self-sealing coupling
  • hydraulic line
  • alternate brake pistons
  • BRAKE-WHEEL 1 [2643GM]
  • SAFETY VALVE-ALTN BRK, WHEEL 1 [2620GM]
  • SERVO VALVE N A 41GG EQ002DEQ0041GG [41GG]
  • safety valve
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 32-42-27-000-001
Removal of the Brake
AMM 32-42-27-400-001
Installation of the Brake
AMM 32-43-00-710-001
Operational Check of Alternate Braking System
AMM 32-43-16-000-001
Removal of the Alternate Brake Safety-Valve
AMM 32-43-16-400-001
Installation of the Alternate Brake Safety-Valve
AMM 32-43-27-000-001
Removal of the Alternate Brake Servovalve
AMM 32-43-27-400-001
Installation of the Alternate Brake Servovalve
AMM 32-43-32-600-001
Reactivation of the Alternate-Brake Manifold Safety-Valve
3. Fault Confirmation
Subtask 32-43-00-710-054-A
A. Test
   (1) Do the operational test of alternate braking with anti-skid AMM 32-43-00-710-001.
   (2) Make sure that the related pistons of the wheel 1 do not extend.
4. Fault Isolation
Subtask 32-43-00-810-058-A ** ON A/C NOT FOR ALL
A. If the test confirms the fault:
  • do a check of the connection of the related self-sealing coupling.
   (1) If not correct:
  • correctly adjust the related self-sealing coupling .
   (2) If the fault continues:
  • do a check for leaks on the hydraulic line between the safety valve (2620GM) and the brake unit (wheel 1).
     (a) If there are leaks:
  • repair the leaks and reactivate the safety valve (2620GM).
     (b) If there are no leaks and if the fault continues:
  • do a check for leaks on the alternate brake pistons of the wheel 1.
       1 If there are leaks:
       2 If there are no leaks and if the fault continues:
   (3) If the fault continues:
Subtask 32-43-00-810-058-C ** ON A/C NOT FOR ALL
A. If the test confirms the fault:
  • do a check of the connection of the related self-sealing coupling.
   (1) If not correct:
  • correctly adjust the related self-sealing coupling .
   (2) If the fault continues:
  • do a check for leaks on the alternate brake pistons of the wheel 1.
     (a) If there are leaks:
   (3) If the fault continues:
  • do a check for leaks on the hydraulic line between the Alternate-Brake Manifold (2853GM) and the brake unit (wheel 1).
     (a) If there are leaks:
  • repair the leaks and reactivate the safety valve on the Alternate-Brake Manifold (2853GM) AMM 32-43-32-600-001.
[Rev.8 from Aug 2018] 2026.04.04 04:31:40 UTC
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