E 56 E E E c If the fault continues:
_
- replace the CTL UNIT-THROTTLE, ENG 1 (8KS1) (Ref. AMM TASK 76-11-19-000-042) and (Ref. AMM TASK 76-11-19-400-042).
(2) If the test does not give the maintenance message DIR VLV, J5, ECU then DIR VLV, J6, ECU:
- replace the RELAY-THRUST REV INHIBITION, ENG 1 (14KS1) (Ref. ASM 73-25/16).
(a) If the fault continues:
- replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).
(b) If the fault continues:
- replace the EIU-1 (1KS1) (Ref. AMM TASK 73-25-34-000-040) and (Ref. AMM TASK 73-25-34-400-040).
(c) If the fault continues:
- replace the CTL UNIT-THROTTLE, ENG 1 (8KS1) (Ref. AMM TASK 76-11-19-000-042) and (Ref. AMM TASK 76-11-19-400-042).
B. Do the test given in Para. 3.
(1) No additional maintenance action is required if the fault is not confirmed.
(2) Repeat the fault isolation procedure if the fault continues.
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TASK 78-31-00-810-816
Failure of the Control of the Thrust-Reverser HCU Directional-Valve through the two Channels on Engine 2
1. Possible Causes
_______________
- RELAY-THRUST REV INHIBITION, ENG 2 (14KS2)
- EIU-2 (1KS2)
- CTL UNIT-THROTTLE, ENG 2 (8KS2)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
78-31-00-810-819 Failure of the Control of the Thrust-Reverser HCU Directional-Valve through the Channel A on Engine 2 78-31-00-810-820 Failure of the Control of the Thrust-Reverser HCU
Directional-Valve through the Channel B on Engine 2 AMM 73-21-60-000-001 Removal of the Electronic Control Unit (ECU) AMM 73-21-60-400-001 Installation of the Electronic Control Unit (ECU) AMM 73-25-34-000-040 Removal of the Engine Interface Unit (EIU) AMM 73-25-34-400-040 Installation of the Engine Interface Unit (EIU) AMM 76-11-19-000-042 Removal of the Throttle Control Unit (8KS1, 8KS2) AMM 76-11-19-400-042 Installation of the Throttle Control Unit (8KS1,
8KS2)
AMM 78-31-00-710-042 Operational Test of the Thrust Reverser System
ASM 73-25/16
3. Fault Confirmation
__________________
A. Test
(1) Do the operational test of the thrust reverser system (Ref. AMM TASK 78-31-00-710-042).
4. Fault Isolation
_______________
A. The fault message is generated when the ECU detects an open circuit or a short to ground on both solenoids of the HCU directional valve on channel A and channel B or on associated electrical wiring. Most probable cause is an inhibition relay (14KS2) failure or of its control.
CAUTION : MAKE SURE THAT THERE IS NO HYDRAULIC PRESSURE WHILE YOU DO THIS
_______ TEST. PUT A WARNING NOTICE IN THE COCKPIT TO TELL PERSONS NOT TO PRESSURIZE THE HYDRAULIC SYSTEMS.
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(1) If the test gives the maintenance message DIR VLV, J5, ECU then DIR VLV, J6, ECU:
- remove the RELAY-THRUST REV INHIBITION, ENG 2 (14KS2) from its base on 188VU,
- on the overhead panel 50VU, push and release the P/BSW-ENG/FADEC GND PWR/2 (7KS2) the ON legend comes on,
- set the engine 2 throttle lever to the reverse thrust position,
- do a check for 28VDC at pin A/X of the relay base.
(a) If there is 28VDC:
- make sure that ground is present at pin A/Z of the relay base.
1 If there is no ground:
_ - repair the wiring (Ref. ASM 73-25/16).
2 If there is ground:
_
- replace the RELAY-THRUST REV INHIBITION, ENG 2 (14KS2) (Ref. ASM 73-25/16).
3 If the fault continues:
_
- do the trouble shooting for each maintenance message DIR VLV, J5, ECU (Ref. TASK 78-31-00-810-819) then DIR VLV, J6, ECU (Ref. TASK 78-31-00-810-820).
(b) If there is no 28VDC:
- set the throttle levers to forward idle position,
- on the overhead panel 50VU, push the P/BSW-ENG/FADEC GND PWR/2 (7KS2) the ON legend goes off, 中國航空網 www.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：A320 Trouble Shooting Manual 排故手冊 EXHAUST(9)
