R AMM 32-51-23-000-001 Removal of the Selector Valve Manifold-Assembly
R AMM 32-51-23-400-001 Installation of the Selector Valve Manifold-Assembly AMM 32-51-51-000-003 Removal of the Nose Wheel Steering Electro-Distributor AMM 32-51-51-400-003 Installation of the Nose Wheel Steering Electro-Distributor ASM 32-51/01
3. Fault Confirmation
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A. Test
(1) Do the functional test of the Nose Wheel Steering with the handwheel (Ref. AMM TASK 32-51-00-720-003).
(2) Do the ground scanning of the BSCU (Ref. AMM TASK 32-46-00-740-002).
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4. Fault Isolation
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**ON A/C 001-049, 051-099, 101-105, 151-199, 201-220, 301-399,
A. If the test gives the maintenance message STEERING ELECTRO-HYD MODULE 6GC or BSCU:
- replace the steering selector valve (Ref. AMM TASK 32-51-51-000-003) and (Ref. AMM TASK 32-51-51-400-003).
(1) If the fault continues:
- replace the BSCU (10GG) (Ref. AMM TASK 32-42-34-000-001) and (Ref. AMM TASK 32-42-34-400-001).
(2) If the fault continues:
- do a check for a ground signal at pin A/K of the servo control (6GC) (Ref. ASM 32-51/01).
(a) If there is a ground signal:
- do a check and repair the wiring from the BSCU (10GG) to the servo control (6GC): pin AB/12D to pin A/J (Ref. ASM 32-51/01).
(b) If there is no ground signal:
- do a check and repair the wiring from the servo control (6GC) pin A/K to the ground terminal (Ref. ASM 32-51/01).
(3) If the fault continues:
- do the check of the charge pressure of the nlg shock absorber. (Ref. AMM TASK 12-14-32-614-004).
**ON A/C 106-149, 221-299,
A. If the test gives the maintenance message STEERING ELECTRO-HYD MODULE(6GC)/ BSCU(10GG):
- replace the steering selector valve (Ref. AMM TASK 32-51-51-000-003) and (Ref. AMM TASK 32-51-51-400-003).
(1) If the fault continues:
- replace the BSCU (10GG) (Ref. AMM TASK 32-42-34-000-001) and (Ref. AMM TASK 32-42-34-400-001).
(2) If the fault continues:
- do a check for a ground signal at pin A/K of the servo control (6GC) (Ref. ASM 32-51/01).
(a) If there is a ground signal:
- do a check and repair the wiring from the BSCU (10GG) to the servo control (6GC): pin AB/12D to pin A/J (Ref. ASM 32-51/01).
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(b) If there is no ground signal: - do a check and repair the wiring from the servo control (6GC) pin A/K to the ground terminal (Ref. ASM 32-51/01).
(3) If the fault continues: - do the check of the charge pressure of the nlg shock absorber. (Ref. AMM TASK 12-14-32-614-004).
R **ON A/C 401-499,
R R R R A. If the test gives the maintenance message STEERING SELECTOR VALVE(7GC)/ BSCU(10GG): - replace the SERVO CTL-N/W STEERING (7GC) (Ref. AMM TASK 32-51-23-000-001) and (Ref. AMM TASK 32-51-23-400-001).
R R R (1) If the fault continues: - replace the BSCU (10GG) (Ref. AMM TASK 32-42-34-000-001) and (Ref. AMM TASK 32-42-34-400-001).
R R R (2) If the fault continues: - do a check and repair the wiring from the selector valve (7GC) to the BSCU (10GG)
R R R (3) If the fault continues: - do the check of the charge pressure of the nlg shock absorber. (Ref. AMM TASK 12-14-32-614-004).
**ON A/C ALL
B. Test Do the test given in Para. 3.A.
TASK 32-51-00-810-815
Nosewheel Steering Order Disagree
1. Possible Causes_______________
- BSCU (10GG)
- XMTR UNIT-N/W STRG HANDWHEEL,CAPT (1GC)
- XMTR UNIT-N/W STRG HANDWHEEL,F/O (2GC)
- XDCR UNIT-PEDAL POS, L (25CE1)
- XDCR UNIT-PEDAL POS, R (25CE2)
- wiring from the BSCU (10GG) to the handwheel (1GC)
- wiring from the BSCU (10GG) to the handwheel (2GC) 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320 Trouble Shooting Manual 排故手册 起落架 LANDING GEAR 2(106)
