2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 71-50-00-210-001 Visual Inspection of the Power Plant Wire Harness AMM 71-51-43-000-049 Removal of the ECU (Channel A) to Thrust Reverser Junction Box Harnesses (4213KS) AMM 71-51-43-400-049 Installation of the ECU (Channel A) to Thrust
Reverser Junction Box Harnesses (4213KS) 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 78-31-00-710-042 Operational Test of the Thrust Reverser System AMM 78-31-51-000-042 Removal of the Hydraulic Control Unit AMM 78-31-51-400-042 Installation of the Hydraulic Control Unit ASM 73-25/16
3. Fault Confirmation
__________________
A. Do the operational test of the thrust reverser system (1B) (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 the solenoid of the HCU pressurizing valve on channel B or on associated electrical wiring.
(1) If the test gives the maintenance message HCU (TRPV), J6, ECU:
- disconnect the harness J6 from the ECU (4000KS),
- apply 28VDC between pin 17 (+) and pin 18 (-) on harness J6 and do a check of the value of the current, which must be between 350 and 630 mA (Ref. ASM 73-25/16).
F 『 EEFF : ALL E ∞∞78-31-00∞∞∞∞∞∞∞∞∞∞Page 236
E E May 01/05 E E ECES
E
F 『
E C F M E
E E
E 56 E
E E
(a) If the current is out of the specified values:
- disconnect the channel B harness from the HCU-THRUST REV (4101KS) and do an insulation and continuity check of the harness J6 and thrust reverser harness between the ECU and the HCU connector A.
1 If there is a fault:
_
- repair or replace the harness J6 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), J6, ECU, this indicates that the fault was intermittent and is no longer present:
- do a check of the harness J6, 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.
(a) 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).
(b) If no damage is found:
- no additional action is required.
(3) If the fault message HCU (TRPV), J6, 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 J6 and the thrust reverser harness (Ref. R AMM TASK 71-51-43-000-049) and (Ref. AMM TASK 71-51-43-400-
049).
F 『 EEFF : ALL E ∞∞78-31-00∞∞∞∞∞∞∞∞∞∞Page 237
E E May 01/05 E E ECES
E F 『 E C F M E E E E 56 E E E 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.
F 『 EEFF : ALL E ∞∞78-31-00∞∞∞∞∞∞∞∞∞∞Page 238
E E May 01/05 ERE
ECES
F 『
E C F M E
E E
E 56 E
E E
TASK 78-31-00-810-827
Failure of the Control of the Thrust-Reverser HCU Pressurizing-Valve through the Channel A on Engine 2
1. Possible Causes
_______________
R - HCU-THRUST REV (4101KS)
R - ECU (4000KS)
R - harness
2. Job Set-up Information 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320 Trouble Shooting Manual 排故手册 EXHAUST(21)
