4. Fault Isolation
_______________
**ON A/C 001-049, 051-099, 101-105, 151-199, 201-220, 301-399,
A. If the test gives the maintenance message:
BRAKE SELECTOR VALVE 23GG OR BSCU
- replace the BSCU (10GG) (Ref. AMM TASK 32-42-34-000-001) and (Ref. AMM TASK 32-42-34-400-001).
(1) If the fault continues:
- do a check for a ground signal at pin A/B of the selector valve (23GG) (Ref. ASM 32-42/01)
(a) If there is a ground signal:
- do a check and repair the wiring from the selector valve (23GG) to the BSCU (10GG) pin A/A to pin AB/4C, (Ref. ASM 32-42/01).
(b) If there is no ground signal:
- repair the wiring from the selector valve (23GG) pin A/B to the ground (Ref. ASM 32-42/01).
R **ON A/C 106-149, 221-299, 401-499,
A. If the test gives the maintenance message:
BRK SELECTOR VALVE (23GG) / BSCU (10GG)
- replace the BSCU (10GG) (Ref. AMM TASK 32-42-34-000-001) and (Ref. AMM TASK 32-42-34-400-001).
(1) If the fault continues:
- do a check for a ground signal at pin A/B of the selector valve (23GG) (Ref. ASM 32-42/01)
(a) If there is a ground signal:
- do a check and repair the wiring from the selector valve (23GG) to the BSCU (10GG) pin A/A to pin AB/4C, (Ref. ASM 32-42/01).
(b) If there is no ground signal:
- repair the wiring from the selector valve (23GG) pin A/B to the ground (Ref. ASM 32-42/01).
**ON A/C ALL
B. Do the test given in Para. 3.A.
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞32-42-00∞∞∞∞∞∞∞∞∞∞Page 222
Aug 01/05 CES
TASK 32-42-00-810-814
Failure of the Selector Valve (closed)
1. Possible Causes
_______________
- SEL VALVE-BRK (23GG)
- Green system hydraulic pipes
- wiring between the BSCU (10GG) and the brake selector valve (23GG)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 32-42-00-710-001 Operational Check of the Normal Braking System AMM 32-42-00-870-001 Bleeding of the Normal Braking at the Brake Units AMM 32-42-11-000-001 Removal of the Brake Selector Valve 23GG AMM 32-42-11-400-001 Installation of the Brake Selector Valve 23GG AMM 32-42-36-860-001 Reactivation of the Normal-Brake Safety-Valve AMM 32-46-00-740-005 BITE Test of the Normal Braking System ASM 32-42/01
3. Fault Confirmation
__________________
**ON A/C 001-049, 051-099, 101-105, 151-199, 201-220, 301-399,
A. Test
(1) Do the operational test of the NORMAL BRAKING SYSTEM (Ref. AMM TASK 32-42-00-710-001).
- Make sure that, on the panel 400 VU the brake yellow pressure triple indicator shows the left and right side pressure values.
- Do a check for leaks or rupture on the hydraulic pipes related to the Green system on a same landing gear.
R **ON A/C 106-149, 221-299, 401-499,
A. Test
(1) Do the BITE test of the Normal Braking System. (Ref. AMM TASK 32-46-00-740-005)
- Make sure that, on the panel 400VU the brake yellow pressure triple indicator shows the left and right side pressure values.
- Do a check for leaks or rupture on the hydraulic pipes related to the Green system on a same landing gear.
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞32-42-00∞∞∞∞∞∞∞∞∞∞Page 223
Aug 01/05 CES
**ON A/C ALL
4. Fault Isolation
_______________
A. If you find leaks or rupture:
- replace the Green system hydraulic pipes
- reactivate the related brake safety valves (Ref. AMM TASK 32-42-36-860-001)
- bleed the Normal brake system at the brake unit (Ref. AMM TASK 32-42-00-870-001).
(1) If you do not find leaks or ruptures:
- replace the SEL VALVE-BRK (23GG), (Ref. AMM TASK 32-42-11-000-001) and (Ref. AMM TASK 32-42-11-400-001).
(2) If the fault continues:
- do a check and repair the wiring between the BSCU (10GG) and the brake selector valve (23GG) (Ref. ASM 32-42/01).
中國航空網(wǎng) m.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 1(103)
