- install the steering servo valve (Ref. AMM TASK 32-51-51-400-001).
 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 4E: refer to
 paragraph C.

 - if the trouble shooting data gives the fault code 53: refer to
 paragraph D.

 - if the trouble shooting data gives the fault code 58: 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 4E:
 - 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 53:
 - 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)
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-049, 051-099, 101-105, 151-199, ∞∞32-51-00∞∞∞∞∞∞∞∞∞∞Page A204
 201-220, 301-399, Aug 01/05 CES

 (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).

 (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).

 (3) If the fault continues:

 - replace the BSCU (10GG) (Ref. AMM TASK 32-42-34-000-001) (Ref. AMM TASK 32-42-34-400-001)

 (4) If the fault continues:

 - check the voltage at sensors 3GC and 4GC (Ref. AMM TASK 32-51-19-220-001)

 (5) If the fault continues:

 - do the check of the charge pressure of the NLG shock absorber. (Ref. AMM TASK 12-14-32-614-004)
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-049, 051-099, 101-105, 151-199, ∞∞32-51-00∞∞∞∞∞∞∞∞∞∞Page A205
 201-220, 301-399, Aug 01/05 CES

 E. If the fault continues and if the TROUBLE SHOOTING DATA gives the fault code 58:
 - replace the electro-distributor valve (Ref. AMM TASK 32-51-51-000-003) and (Ref. AMM TASK 32-51-51-400-003).
 (1) If the fault continues:

 - check the voltage at sensors 3GC and 4GC (Ref. AMM TASK 32-51-19-220-001).

 (2) If the fault continues:

 - do the check of the charge pressure of the NLG shock absorber. (Ref. AMM TASK 12-14-32-614-004)
　
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本文鏈接地址：A320 Trouble Shooting Manual 排故手冊(cè) 起落架 LANDING GEAR 2(137)