b If there is no short to ground:
_ - replace the C/B-HUDRAULIC/BRK FAN/WHEELS 1 & 2 (1GS)
(b) If the circuit breaker (1GS) stays closed and if the fault continues:
- replace the CONTACTOR-BRK FAN, L (5GS).
B. Test Do the test given in Para. 3.A.(1).
TASK 32-48-00-810-803
Brake Fans Inoperative on the Wheel 3 & 4
1. Possible Causes
_______________
- MOTOR ASSY-BRK FAN,WHEEL AXLE 4 (10GS)
- MOTOR ASSY-BRK FAN,WHEEL AXLE 3 (8GS)
- wiring between the right brake fan contactor (6GS) at pins A/A1, B1, C1 and the first terminal block
- wiring from the right brake fan contactor (6GS) pin A/X2 to the first terminal block
- wiring from the right brake fan contactor (6GS) pin A/X1 to the first terminal block
- CONTACTOR-BRK FAN, R (6GS)
- wiring from the right brake fan contactor (6GS) to the circuit breaker (2GS)
- C/B-HYDRAULIC/BRK FAN/WHEEL 3 & 4 (2GS)
- C/B-HYDRAULIC/BRK FAN/WHEELS 3 & 4 (2GS)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 32-48-00-710-001 Functional Test of The Brake Cooling System AMM 32-48-51-000-005 Removal of the Fan Assy (7GS,8GS,9GS,10GS) AMM 32-48-51-400-005 Installation of the Fan Assy (7GS,8GS,9GS,10GS) ASM 32-48/01
3. Fault Confirmation
__________________
A. Test
(1) Do the operational test of the brake cooling system (Ref. AMM TASK 32-48-00-710-001).
(a) If the circuit breaker (2GS) trips:
- refer to Para. 4.A.(2).
(2) Make sure that the fans do not operate on the right gear.
4. Fault Isolation
_______________
A. If the test confirms the fault:
- do a check of the circuit breaker (2GS) status.
(1) If the circuit breaker (2GS) is closed:
- do a check for 115VAC at pins A/A1, B1, C1 of the right brake fan contactor (6GS) (Ref. ASM 32-48/01).
(a) If there is 115VAC:
- do a check of the wiring between the right brake fan contactor (6GS) at pins A/A1, B1, C1 and the first terminal block (Ref. ASM 32-48/01).
1 If there is no continuity:
_ - repair the related wiring.
2 If there is continuity:
_
- do a check for a ground signal at pin A/X2 of the right brake fan contactor (6GS) (Ref. ASM 32-48/01).
a If there is no ground signal:
_
- repair the wiring from the right brake fan contactor (6GS) pin A/X2 to the first terminal block (Ref. ASM 32-48/01).
b If there is a ground signal:
_
- do a check and repair the wiring from the right brake fan contactor (6GS) pin A/X1 to the first terminal block (Ref. ASM 32-48/01).
(b) If there is no 115VAC:
- replace the CONTACTOR-BRK FAN, R (6GS).
1 If the fault continues:
_
- do a check of the wiring from the right brake fan contactor (6GS) to the circuit breaker (2GS): pins A/A2, B2, C2 to pins A2, B2, C2 (Ref. ASM 32-48/01).
a If there is no continuity:
_ - repair the related wiring.
b If there is continuity:
_ - replace the C/B-HYDRAULIC/BRK FAN/WHEEL 3 & 4 (2GS)
(2) If the circuit breaker (2GS) is open:
- close the circuit breaker.
(a) If the circuit breaker trips:
- replace the CONTACTOR-BRK FAN, R (6GS) or MOTOR ASSY-BRK FAN,WHEEL AXLE 4 (10GS) or MOTOR ASSY-BRK FAN,WHEEL AXLE 3 (8GS),
「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 : 051-099, 301-399, 401-499, ∞∞32-48-00∞∞∞∞∞∞∞∞∞∞Page 207
Aug 01/05 CES (Ref. AMM TASK 32-48-51-000-005) and (Ref. AMM TASK 32-48-51-400-005)
1 If the fault continues:
_
- do a check for a short to ground at: . the wiring from the circuit breaker (2GS) to the right brake fan contactor (6GS): pins A2, B2, C2 to pins A/A2, B2, C2 . the wiring from the right brake fan contactor (6GS) pins A/A1, B1, C1 to the wheel axle 4, brake- fan motor assy (10GS) pin A/1,2,3. . the wiring from the right brake fan contactor (6GS) pins A/A1, B1, C1 to the wheel axle 3, brake- fan motor assy (8GS) pin A/1,2,3. (Ref. ASM 32-48/01).
a If there is a short to ground:
_ - repair the related wiring.
b If there is no short to ground: 中國航空網(wǎng) www.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：A320 Trouble Shooting Manual 排故手冊 起落架 LANDING GEAR 2(81)
