- examine the electrical connector for corrosion.
(a) If there is corrosion:
- replace the SERVO CTL-N/W STEERING (6GC) (Ref. AMM TASK 32-51-51-000-001) and (Ref. AMM TASK 32-51-51-400-001).
(b) If there is no corrosion:
- dry the electrical connector of the N/W steering servo control (6GC) and connect it.
(2) If there is no water:
- remove the steering servo valve (Ref. AMM TASK 32-51-51-000-002)
- do a check for water in the two electrical connectors of the N/W steering servo control.
(a) If there is water:
- examine the electrical connectors for corrosion.
1 If there is corrosion:
_
- replace the SERVO CTL-N/W STEERING (6GC) (Ref. AMM TASK 32-51-51-000-001) and (Ref. AMM TASK 32-51-51-400-001).
2 If there is no corrosion:
_
- dry the two electrical connectors and install the steering servo valve (Ref. AMM TASK 32-51-51-400-002).
(b) If there is no water:
- install the steering servo valve (Ref. AMM TASK 32-51-51-400-001).
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B. If the fault continues, read the TROUBLE SHOOTING DATA of the BSCU (Ref. 32-42-00, P.Block 301):
- if the trouble shooting data gives the fault code 745: refer to paragraph C.
- if the trouble shooting data gives the fault code 671: refer to paragraph D.
- if the trouble shooting data gives the fault code 654: refer to paragraph E.
NOTE : If code XXX is shown after a free fall extension ,no maintenance
____
action is necessary
C. If the fault continues and if the TROUBLE SHOOTING DATA gives the fault code 745:
- replace the steering servo valve (Ref. AMM TASK 32-51-51-000-002) and (Ref. AMM TASK 32-51-51-400-002).
(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).
(a) If the fault continues:
- do a check and repair the wiring between the BSCU (10GG) pins AB/12E, 12F, 13E, 13F, 14E, 14F and the N/W steering servo control (6GC) pins A/G,H,E,F,C,D (Ref. ASM 32-51/01).
(2) If the fault continues:
- check the voltage at the sensors 3GC and 4GC (Ref. AMM TASK 32-51-19-220-001).
(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)
D. If the fault continues and if the TROUBLE SHOOTING DATA gives the fault code 671:
- do the door ground opening/closing (Ref. AMM TASK 32-22-00-010-001) and (Ref. AMM TASK 32-22-00-410-001).
(1) If you can set the door ground opening control lever to the closed position:
- replace the steering servo valve (Ref. AMM TASK 32-51-51-000-002) and (Ref. AMM TASK 32-51-51-400-002)
(2) If you cannot set the door ground-opening control lever to the closed position:
- do a LGCIU CB(s) Reset.
(a) If the fault continues:
- replace the LGCIU-1 (5GA1) (Ref. AMM TASK 32-31-71-000-001) and (Ref. AMM TASK 32-31-71-400-001).
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(b) If the fault continues:
- replace the hydraulic control relay 48GA.
(c) If the fault continues:
- replace the SAFETY VALVE-L/G SYS ISOLATION (49GA) (Ref. AMM TASK 32-31-17-000-001) and (Ref. AMM TASK 32-31-17-400-001).
(d) If the fault continues:
- replace the SEL VALVE-L/G DOORS (41GA) (Ref. AMM TASK 32-31-34-000-001) and (Ref. AMM TASK 32-31-34-400-001).
(e) If the fault continues:
- do a check and repair the: . wiring from the landing gear system isolation safety valve (49GA) pin A/B to the hydraulic control relay (48GA) pin A/2. . wiring from the landing gear doors selector valve (41GA) pins A/B, F to the LGCIU1 pins AA/1A, 1B. . wiring from the hydraulic control relay (48GA) pin A/X, to the ground service bus changeover relay (53GA) pin B2. . wiring from the hydraulic control relay (48GA) pin A/A to the first terminal block. . wiring from the hydraulic control relay (48GA) pin A/B to the first terminal block. . wiring from the hydraulic control relay (48GA) pin A/Z to the ADIRU1 (1FP1) pin AA/13H, to the ADIRU3 (1FP3) pin AA/13H, to the LGCIU1 (5GA1) pin AA/10K (Ref. ASM 32-31/05) (Ref. ASM 32-31/07).
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本文链接地址：A320 Trouble Shooting Manual 排故手册 起落架 LANDING GEAR 2(138)
