R **ON A/C ALL
TASK 32-43-00-810-809
Loss of Alternate Braking on the Wheel 1 (Hydraulic Failure)
1. Possible Causes
_______________
- BRAKE-WHEEL 1 (2643GM)
- related self-sealing coupling
- hydraulic line
- alternate brake pistons
- SAFETY VALVE-ALTN BRK,WHEEL 1 (2620GM)
- SERVOVALVE-ALT BRK,WHEEL 1 (41GG) R - safety valve
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 32-42-27-000-001 Removal of the Brake (2641GM,2642GM,2643GM,2644GM) AMM 32-42-27-400-001 Installation of the Brake
(2641GM,2642GM,2643GM,2644GM) 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 40GG(43GG),
41GG(42GG)
AMM 32-43-27-400-001 Installation of the Alternate Brake Servovalve
40GG(43GG), 41GG(42GG) R AMM 32-43-32-600-001 Reactivation of the Alternate-Brake Manifold R Safety-Valve
3. Fault Confirmation
__________________
A. Test
(1) Do the operational test of alternate braking with anti-skid (Ref. AMM TASK 32-43-00-710-001).
(2) Make sure that the related pistons of the wheel 1 do not extend.
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞32-43-00∞∞∞∞∞∞∞∞∞∞Page 216
Aug 01/05 CES
4. Fault Isolation
_______________
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
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:
_
- replace the BRAKE-WHEEL 1 (2643GM) (Ref. AMM TASK 32-42-27-000-001) and (Ref. AMM TASK 32-42-27-400-001) and reactivate the safety valve (2620GM).
2 If there are no leaks and if the fault continues:
_
- replace the SAFETY VALVE-ALTN BRK,WHEEL 1 (2620GM) (Ref. AMM TASK 32-43-16-000-001) and (Ref. AMM TASK 32-43-16-400-001).
(3) If the fault continues:
- replace the SERVOVALVE-ALT BRK,WHEEL 1 (41GG) (Ref. AMM TASK 32-43-27-000-001) and (Ref. AMM TASK 32-43-27-400-001).
R **ON A/C 401-499,
R A. If the test confirms the fault:
R - do a check of the connection of the related self-sealing coupling.
R (1) If not correct:
R - correctly adjust the related self-sealing coupling.
R (2) If the fault continues:
R - do a check for leaks on the alternate brake pistons of the wheel 1.
R (a) If there are leaks:
R - replace the BRAKE-WHEEL 1 (2643GM) (Ref. AMM TASK 32-42-27-000-R 001) (Ref. AMM TASK 32-42-27-400-001) and reactivate the safety
R valve on the Alternate-Brake Manifold (2853GM).
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞32-43-00∞∞∞∞∞∞∞∞∞∞Page 217
Aug 01/05 CES
R (3) If the fault continues:
R - do a check for leaks on the hydraulic line between the
R Alternate-Brake Manifold (2853GM) and the brake unit (wheel 1).
R (a) If there are leaks:
R - repair the leaks and reactivate the safety valve on the
R Alternate-Brake Manifold (2853GM) (Ref. AMM TASK 32-43-32-600-
R 001).
R **ON A/C ALL
TASK 32-43-00-810-810
Loss of Alternate Braking on the Wheel 2 (Hydraulic Failure)
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