(2) Do the operational test of the FADEC 2A on the ground (with engine non motoring) (Ref. AMM TASK 73-29-00-710-040).
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4. Fault Isolation
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A. If the circuit breaker (3JH2) is closed and if the test gives the maintenance message J2, 115 VAC, ECU:
R CAUTION : WHEN THE "ENG/MASTER" LEVER IS IN THE "ON" POSITION, BE VERY_______
R CAREFUL NOT TO SET THE "ENG/MODE" SELECTOR SWITCH TO "CRANK" OR
R "IGN/START".
R IF YOU DO SET THE SELECTOR SWITCH TO ONE OF THESE POSITIONS,
R THE ENGINE WILL START. THERE IS THUS A RISK OF INJURY TO
R PERSONS AND OF DAMAGE TO EQUIPMENT.
R - On the panel 115 VU, set the MASTER switch to "ON".
- do a check for 115VAC at the ECU (4000KS) pins J2/7 (Ref. ASM 74-
31/01). R - On the panel 115 VU, set the MASTER switch to "OFF".
(1) If there is 115VAC:
- 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 no 115VAC:
- do a check for 115VAC at the EIU-2 (1KS2) pin AC/1.
(a) If there is 115VAC:
- replace the EIU-2 (1KS2) (Ref. AMM TASK 73-25-34-000-040) and (Ref. AMM TASK 73-25-34-400-040).
1 If the fault continues:
_
- replace the J2 harness between the EIU-2 (1KS2) and the ECU (4000KS).
(b) If there is no 115VAC:
- do a check of the wiring between the EIU-2 (1KS2) pin AC/1 and the circuit breaker (3JH2).
1 If there is no continuity:
_ - repair the above wiring.
2 If there is continuity:
_
- replace the C/B-ENGINE/IGN/ENG2/SYS B (3JH2).
(3) If the fault continues:
- make sure that there is no ground signal at the EIU-2 (1KS2) pin AA/5B.
B. If the circuit breaker (3JH2) is open:
- close it.
(1) If the circuit breaker trips:
- remove the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and
- remove the EIU-2 (1KS2) (Ref. AMM TASK 73-25-34-000-040).
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- do a check and repair the wiring for short to ground between the EIU-2 (1KS2) pin AC/1 and the circuit breaker (3JH2).
(a) If the fault continues:
- replace the C/B-ENGINE/IGN/ENG2/SYS B (3JH2).
(3) If the circuit breaker stays closed:
- install the EIU-2 (1KS2) (Ref. AMM TASK 73-25-34-400-040).
(a) If the circuit breaker trips:
- replace the EIU-2 (1KS2) (Ref. AMM TASK 73-25-34-000-040) and (Ref. AMM TASK 73-25-34-400-040).
(b) If the circuit breaker stays closed:
- install the ECU (4000KS) (Ref. AMM TASK 73-21-60-400-001).
1 If the circuit breaker trips:
_
- replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).
2 If the circuit breaker trips again:
_
- do a check and repair the wiring between the ECU (4000KS) pins J2/7 and the EIU-2 (1KS2) pin AC/4.
(4) If the fault continues:
- make sure that there is no ground signal at the EIU-2 (1KS2) pin AA/5B.
C. Do the test given in Para. 3.
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Failure of the Thrust Reverser Inhibition Switch - Engine 1 - Channel A
1. Possible Causes
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- CTL UNIT-THROTTLE, ENG 1 (8KS1)
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本文链接地址：A320 Trouble Shooting Manual 排故手册 动力装置 POWER PLANT(11)
