- apply 28VDC between pin 17 (+) and pin 18 (-) on harness J5 and do a check of the value of the current, which must be between 350 and 630 mA (Ref. ASM 73-25/16).
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(a) If the current is out of the specified values:
- disconnect the channel A harness from the HCU-THRUST REV (4101KS) and do an insulation and continuity check of the harness J5 and thrust reverser harness between the ECU and the HCU connector A.
1 If there is a fault:
_
- repair or replace the harness J5 or the thrust reverser harness or the junction box (Ref. AMM TASK 71-51-43-000-049) and (Ref. AMM TASK 71-51-43-400-049).
2 If nothing is found:
_
R - replace the HCU-THRUST REV (4101KS) (Ref. AMM TASK 78-31-51-
R 000-042) and (Ref. AMM TASK 78-31-51-400-042).
(b) If the current is in the specified values: R - replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and R (Ref. AMM TASK 73-21-60-400-001).
(2) If the test does not give the maintenance message HCU (TRPV), J5, ECU, this indicates that the fault was intermittent and is no longer present:
- do a check of the harness J5, the thrust reverser harness and the junction box for absence of damage (Ref. AMM TASK 71-50-00-210-001),
- do a check of the connectors for looseness, contamination, bent pins.
(3) If damage is found:
- clean, retighten or replace the harness as required (Ref. AMM TASK 71-51-43-000-049) and (Ref. AMM TASK 71-51-43-400-049).
(4) If no damage is found:
- no additional action is required.
(5) If the fault message HCU (TRPV), J5, ECU becomes repetitive and is
never confirmed during the operational test of the thrust reverser: R - replace the HCU-THRUST REV (4101KS) (Ref. AMM TASK 78-31-51-000-R 042) and (Ref. AMM TASK 78-31-51-400-042).
(a) If the fault continues: R - replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and R (Ref. AMM TASK 73-21-60-400-001).
(b) If the fault continues: R - replace the harness J5 and the thrust reverser harness (Ref. R AMM TASK 71-51-43-000-049) and (Ref. AMM TASK 71-51-43-400-
049).
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(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 78-31-00-810-828
Failure of the Control of the Thrust-Reverser HCU Pressurizing-Valve through the Channel B on Engine 2
1. Possible Causes
_______________
R - HCU-THRUST REV (4101KS)
R - ECU (4000KS)
R - harness
2. Job Set-up Information
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本文链接地址：A320 Trouble Shooting Manual 排故手册 EXHAUST(22)
