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- disconnect the harnesses J5 and J6 from the HCU pressure switch
- install jumper wires between pins 2 and 3 for the harness J5 and between pins 4 and 5 for the harness J6
- disconnect the harnesses J5 and J6 from the ECU (4000KS) and do a resistance check of the harnesses J5 and J6 between: . pins 12 and 13 (< 5 ohms) . pins 12 and 11 (> 10 megohms) . pin 12 and the ground (> 10 megohms).
(a) If the resistance values are in the specified limits:
- replace the PRESS SW-HCU (4102KS) (Ref. AMM TASK 78-31-16-000-041) and (Ref. AMM TASK 78-31-16-400-041).
(b) If the resistance values are out of the specified limits:
- replace the defective harness J5 (Ref. AMM TASK 71-51-43-000-049) and (Ref. AMM TASK 71-51-43-400-049) or harness J6 (Ref. AMM TASK 71-51-43-000-004) and (Ref. AMM TASK 71-51-43-400-004).
(3) 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. Do the test given in Para. 3.A.
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TASK 78-31-00-810-861
Failure of the T/R Hydraulic Isolation Valve in the Open Position on the Engine
1. Possible Causes
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- VALVE-THRUST REVERSER HYDRAULIC ISOLATION, ENG1 (50EG1)
- STATIC RELAY-THRUST REVERSER LOCKING CTL, ENG1 (3EG1)
- RELAY-THRUST REVERSER LOCKING POWER, ENG1 (2EG1)
- SEC-1 (1CE1)
- SEC-2 (1CE2)
2. Job Set-up Information
______________________
A. Referenced Information
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REFERENCE DESIGNATION
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AMM 27-94-34-000-001 Removal of the SEC (1CE1,1CE2,1CE3)
AMM 27-94-34-400-001 Installation of the SEC (1CE1,1CE2,1CE3)
AMM 78-31-00-710-042 Operational Test of the Thrust Reverser System
AMM 78-37-51-000-001 Removal of the Thrust Reverser Hydraulic Isolation
Valve
AMM 78-37-51-400-001 Installation of the Thrust Reverser Hydraulic
Isolation Valve
ASM 78-37/01
3. Fault Confirmation
__________________
A. Test
(1) Open, safety and tag the circuit breaker 1EG1 and do the operational test of the thrust reverser system (1A and 1B) (Ref. AMM TASK 78-31-00-710-042).
4. Fault Isolation
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A. Table of the circuit breakers used in this procedure:
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PANEL DESIGNATION IDENT. LOCATION
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121VU ENG1/REV/LOCK 1EG1 N44
B. The fault message is generated if the ECU detects a pressurization of the thrust reverser HCU during the thrust reverser isolation valve monitoring test after the engine start. The message indicates that the thrust reverser isolation valve has failed in the open position or is leaking internally.
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(1) If the thrust reverser blocker doors deployed during the test:
- replace the VALVE-THRUST REVERSER HYDRAULIC ISOLATION, ENG1 (50EG1) (Ref. AMM TASK 78-37-51-000-001) and (Ref. AMM TASK 78-37-51-400-001).
(2) If the thrust reverser blocker doors did not deploy during the test:
- look for the cause of abnormal permanent electrical supply of the thrust reverser isolation valve or undue fault annunciation as follows (Ref. ASM 78-37/01),
- replace the STATIC RELAY-THRUST REVERSER LOCKING CTL, ENG1 (3EG1).
(a) If the fault continues:
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本文链接地址：A320 Trouble Shooting Manual 排故手册 EXHAUST(47)
