- make sure that the value of the current is between 350 and 630 mA.
(a) If the current is out of the specified limits:
- replace the HCU-THRUST REV (4101KS) (Ref. AMM TASK 78-31-51-000-042) and (Ref. AMM TASK 78-31-51-400-042).
(b) If the current is in the specified limits:
- on the overhead panel 50VU, push and release the P/BSW-ENG/FADEC GND PWR/1 (7KS1) the ON legend comes on,
- set the engine 1 throttle lever to the reverse thrust position,
- disconnect the harness J5 from the ECU then install a jumper wire between pins 2 and 3 on the thrust reverser harness J5 connector to the HCU,
- do a continuity check between pins 7 and 8 of the harness J5.
1 If there is no continuity:
_
- remove the jumper wire from the harness pins 2 and 3,
- replace the RELAY-THRUST REV INHIBITION, ENG 1 (14KS1) (Ref. ASM 73-25/16).
a If the fault continues:
_
- do a check of the thrust reverser harness including junction box and the aircraft wiring for open circuit (Ref. AMM TASK 78-31-42-210-041).
b If there is no continuity:
_ - repair or replace as required (Ref. ASM 73-25/16).
c If nothing is found:
_
- replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).
2 If there is continuity:
_
- remove the jumper wire from the harness pins 2 and 3,
- do a resistance check at the harness J5 connector to the ECU between: . pins 7 and 11 (>10 megohms) . pins 7 and 8 (>10 megohms) . pin 7 and the ground (>10 megohms).
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F 『 E C F M E E E E 56 E E E a If the resistance values are out of the specified limits:
_
- repair or replace the thrust reverser harness (Ref. AMM TASK 71-51-43-000-049) and (Ref. AMM TASK 71-51-43-400-049), or the aircraft wiring between the ECU and the HCU (Ref. ASM 73-25/16).
b If the resistance values are in the specified limits:
_
- replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).
(2) If the test does not give the maintenance message HCU (TRDV), J5, ECU:
- this indicates that the fault was intermittent and is no longer present,
- do a check of the thrust reverser harness connectors at the ECU, HCU and junction box for looseness, contamination or damaged pins,
- clean, retighten or replace harness as required (Ref. AMM TASK 78-31-42-210-041).
(a) If nothing is found:
- no additional action is required.
(b) If the fault becomes repetitive and is never confirmed during the operational test of the thrust reverser:
- replace the HCU-THRUST REV (4101KS) (Ref. AMM TASK 78-31-51-000-042) and (Ref. AMM TASK 78-31-51-400-042).
1 If the fault continues:
_
- replace the RELAY-THRUST REV INHIBITION, ENG 1 (14KS1) (Ref. ASM 73-25/16).
2 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).
3 If the fault continues:
_
- replace the thrust reverser harness (Ref. AMM TASK 71-51-43-000-049) and (Ref. AMM TASK 71-51-43-400-049).
B. Do the test given in Para. 3.A.
(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 78-31-00-810-818
Failure of the Control of the Thrust-Reverser HCU Directional-Valve through the Channel B on Engine 1
1. Possible Causes
_______________
- HCU-THRUST REV (4101KS)
- RELAY-THRUST REV INHIBITION, ENG 1 (14KS1)
- ECU (4000KS)
- thrust reverser harness
- aircraft wiring
2. Job Set-up Information
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本文链接地址：A320 Trouble Shooting Manual 排故手册 EXHAUST(11)
