(2) De-energize the aircraft electrical circuits
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TASK 32-47-00-810-803
Loss of the Brake Temperature Monitoring on the Wheel 3
1. Possible Causes
_______________
- MONITORING UNIT-BRK TEMP, R (2GW)
- SENSOR, BRK TEMP, WHEEL 3 (4GW)
- wiring from the BTMU (2GW) to the sensor (4GW) pins A/A, C
- wiring from the BTMU (2GW) to the BSCU (10GG)
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific circuit breaker(s) safety clip(s)
No specific millivoltmeter
No specific DC Generator (0 to 50 mv)
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 24-41-00-861-002 Energize the Aircraft Electrical Circuits from the
External Power
AMM 31-60-00-860-001 EIS Start Procedure
AMM 32-46-00-740-001 BITE Test of the BSCU
AMM 32-47-15-000-001 Removal of the Brake Temperature Sensor
(4GW,5GW,6GW,7GW)
AMM 32-47-15-400-001 Installation of the Brake Temperature Sensor
(4GW,5GW,6GW,7GW) R AMM 32-47-18-000-001 Removal of the Brake Temperature Monitoring Unit R AMM 32-47-18-400-001 Installation of the Brake Temperature Monitoring Unit
ASM 32-47/01
3. Fault Confirmation
__________________
A. Job Set-Up
(1) Aircraft Maintenance Configuration
(a) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(b) Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only) (Ref. AMM TASK 31-60-00-860-001).
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B. Test
(1) Do the BITE test of the BSCU (Ref. AMM TASK 32-46-00-740-001).
4. Fault Isolation
_______________
A. Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU HYDRAULIC/BRK/TEMP/DET/UNIT 1GW M37 121VU HYDRAULIC/BRAKING AND STEERING/SYS2/SPLY 4GG M36
R **ON A/C 001-049, 051-099, 101-105, 151-199, 201-220, 301-399,
B. If the test gives the maintenance message BRAKE TEMP SENSOR 4GW OR MONIT UNIT 2GW: - on the brake 3 disconnect the connector of the brake temperature sensor
4GW (Ref. AMM TASK 32-47-15-000-001)
- on the connector of the brake temperature sensor 4GW, connect a DC Generator (0 to 50 mv) with the voltage adjusted to zero millivolt and a millivoltmeter with the polarity as follows: Terminal A: Negative Terminal C: Positive
- Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1GW
- on the ECAM control panel, push the WHEEL key to get the WHEEL page - on the DC generator, increase the voltage.
(1) If the related temperature indication increases on the WHEEL page
- replace the SENSOR, BRK TEMP, WHEEL 3 (4GW) (Ref. AMM TASK 32-47-15-000-001) and (Ref. AMM TASK 32-47-15-400-001).
(2) If the related temperature indication does not increase on the WHEEL page:
- connect the connector of the brake temperature sensor (4GW) (Ref. AMM TASK 32-47-15-400-001)
- replace the MONITORING UNIT-BRK TEMP, R (2GW) (Ref. AMM TASK 32-47-18-000-001) and (Ref. AMM TASK 32-47-18-400-001).
(3) If the fault continues:
- do a check and repair the wiring from the BTMU (2GW) to the sensor (4GW) pins A/A, C (Ref. ASM 32-47/01).
(4) If the fault continues:
- do a check and repair the wiring from the BTMU (2GW) to the BSCU (10GG) pin A/C to pin AB/9D (Ref. ASM 32-47/01).
「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 ∞∞32-47-00∞∞∞∞∞∞∞∞∞∞Page 208
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本文链接地址：A320 Trouble Shooting Manual 排故手册 起落架 LANDING GEAR 2(72)
