3. Fault Confirmation
__________________
A. Test Do the BITE test of the BSCU: (Ref. AMM TASK 32-46-00-740-001).
4. Fault Isolation
_______________
R **ON A/C 001-049, 051-099, 101-105, 151-199, 201-220, 301-399,
A. If the test gives the maintenance message BRK ALTN SERVOVALVE 40GG:
- do a continuity/resistance test at the servovalve. The resistance must be between 90 and 100 ohms.
(1) If the test is not OK:
- replace the SERVOVALVE-ALTN BRK WHEEL 3 (40GG), (Ref. AMM TASK 32-43-27-000-001) (Ref. AMM TASK 32-42-27-400-001).
(2) If the test is OK:
- replace the BSCU (10GG), (Ref. AMM TASK 32-42-34-000-001) and (Ref. AMM TASK 32-42-34-400-001).
(a) If the fault continues:
- do a check and repair the wiring from the BSCU (10GG) to the alternate brake servovalve 40GG pins AB/3A, 3B to pins A/C, A (Ref. ASM 32-43/01).
R **ON A/C 106-149, 221-299, 401-499,
A. If the test gives the maintenance message BRK ALTN SERVOVLV(40GG):
- do a continuity/resistance test at the servovalve. The resistance must be between 90 and 100 ohms.
(1) If the test is not OK:
- replace the SERVOVALVE-ALTN BRK WHEEL 3 (40GG), (Ref. AMM TASK 32-43-27-000-001) (Ref. AMM TASK 32-42-27-400-001).
(2) If the test is OK:
- replace the BSCU (10GG), (Ref. AMM TASK 32-42-34-000-001) and (Ref. AMM TASK 32-42-34-400-001).
(a) If the fault continues:
- do a check and repair the wiring from the BSCU (10GG) to the alternate brake servovalve 40GG pins AB/3A, 3B to pins A/C, A (Ref. ASM 32-43/01).
**ON A/C ALL
B. Do the test given in Para. 3.A.
TASK 32-43-00-810-804
Electrical failure of the Alternate Brake Servovalve (42GG)
1. Possible Causes
_______________
- BSCU (10GG)
- SERVOVALVE-ALTN BRK WHEEL 4 (42GG)
- wiring from the BSCU (10GG) to the alternate brake servovalve (42GG)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
AMM 32-42-34-000-001 Removal of the Braking/Steering Control Unit (BSCU) (10GG) AMM 32-42-34-400-001 Installation of the Braking/Steering Control Unit (BSCU) (10GG) 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)
AMM 32-46-00-740-001 BITE Test of the BSCU
ASM 32-43/01
3. Fault Confirmation
__________________
A. Test Do the BITE test of the BSCU: (Ref. AMM TASK 32-46-00-740-001).
4. Fault Isolation
_______________
R **ON A/C 001-049, 051-099, 101-105, 151-199, 201-220, 301-399,
A. If the test gives the maintenance message BRK ALTN SERVOVALVE 42GG:
- do a continuity/resistance test at the servovalve. The resistance must be between 90 and 100 ohms.
(1) If the test is not OK:
- replace the SERVOVALVE-ALTN BRK WHEEL 4 (42GG) , (Ref. AMM TASK 32-43-27-000-001) and (Ref. AMM TASK 32-43-27-400-001).
(2) If the test is OK:
- replace the BSCU (10GG), (Ref. AMM TASK 32-42-34-000-001) and (Ref. AMM TASK 32-42-34-400-001).
(a) If the fault continues:
- do a check and repair the wiring from the BSCU (10GG) to the alternate brake servovalve (42GG) pins AB/4A, 4B to pins A/C, A (Ref. ASM 32-43/01).
R **ON A/C 106-149, 221-299, 401-499,
A. If the test gives the maintenance message BRK ALTN SERVOVLV(42GG):
- do a continuity/resistance test at the servovalve. The resistance must be between 90 and 100 ohms.
(1) If the test is not OK:
- replace the SERVOVALVE-ALTN BRK WHEEL 4 (42GG) , (Ref. AMM TASK 32-43-27-000-001) and (Ref. AMM TASK 32-43-27-400-001).
(2) If the test is OK:
- replace the BSCU (10GG), (Ref. AMM TASK 32-42-34-000-001) and (Ref. AMM TASK 32-42-34-400-001).
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本文链接地址：A320 Trouble Shooting Manual 排故手册 起落架 LANDING GEAR 2(34)
