- replace the RELAY-THRUST REVERSER LOCKING POWER, ENG1 (2EG1).
(b) If the fault continues:
- remove the static relay (3EG1) from its base on shelf 120VU and do a check for permanent ground at pin A/1.
1 If there is ground:
_
- do a check for short to ground between the SEC1 (1CE1), the SEC2 (1CE2) and the static relay (3EG1).
a If the wiring is not correct:
_ - repair as required.
b If the wiring is correct:
_
- do the trouble shooting of the SEC1 (1CE1) and the SEC2 (1CE2) for abnormal ground at pin AB/15E on the SEC1 (1CE1) and at pin AB/15E on the SEC2 (1CE2) (Ref. ASM 78-37/01),
- look for any FCDC or radio altimeter failure (in Post Flight Report (PFR)) causing SEC output malfunction (TSM chapter 27).
. If no external failure to the SECs is found:
- replace successively the SEC-1 (1CE1) then the SEC-2 (1CE2) (Ref. AMM TASK 27-94-34-000-001) and (Ref. AMM TASK 27-94-34-400-001).
C. Make sure that this(these) circuit breaker(s) is(are) closed:
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------
121VU ENG1/REV/LOCK 1EG1 N44
D. Check that the warning and failure message do not duplicate at next
engine start.
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TASK 78-31-00-810-862
Failure of the T/R Hydraulic Isolation Valve in the Open Position on the Engine
1. Possible Causes
_______________
- VALVE-THRUST REVERSER HYDRAULIC ISOLATION, ENG2 (50EG2)
- STATIC RELAY-THRUST REVERSER LOCKING CTL, ENG2 (3EG2)
- RELAY-THRUST REVERSER LOCKING POWER, ENG2 (2EG2)
- SEC-1 (1CE1)
- SEC-3 (1CE3)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
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 1EG2 and do the operational test of the thrust reverser system (2A and 2B) (Ref. AMM TASK 78-31-00-710-042).
4. Fault Isolation
_______________
A. Table of the circuit breakers used in this procedure:
-------------------------------------------------------------------------------
PANEL DESIGNATION IDENT. LOCATION
-------------------------------------------------------------------------------
121VU ENG2/REV/LOCK 1EG2 N45
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, ENG2 (50EG2) (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, ENG2 (3EG2).
(a) If the fault continues:
- replace the RELAY-THRUST REVERSER LOCKING POWER, ENG2 (2EG2).
(b) If the fault continues:
- remove the static relay (3EG2) from its base on shelf 120VU and do a check for permanent ground at pin A/1.
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本文链接地址：A320 Trouble Shooting Manual 排故手册 EXHAUST(48)
