2. Job Set-up Information
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A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 73-25-34-000-040 Removal of the Engine Interface Unit (EIU)
AMM 73-25-34-400-040 Installation of the Engine Interface Unit (EIU)
ASM 73-25/08
ASM 73-25/23
3. Fault Confirmation
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A. Test
NOTE : The landing gear must be correctly compressed without any tools or
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maintenance action.
- On the overhead panel 50VU, push the FADEC GND PWR 1 pushbutton switch.
- Put the throttle control levers in the idle position.
- On the left or right MCDU, get access to the ENGINE MAIN MENU screen.
- On the MCDU, push the line key (4R) adjacent to the applicable Specific tests indication.
- push the line key (5L) adjacent to the SEC RELAY STATUS:
(1) If MCDU screen indicates SEC RELAY CLOSED, the failure is not confirmed.
- No further action is required
(2) If MCDU screen indicates SEC RELAY OPEN, the failure is confirmed.
- Do the step 4. Fault Isolation
4. Fault Isolation
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A. If MCDU screen indicates SEC RELAY OPEN:
- On the left or right MCDU, get access to the ENGINE MAIN MENU screen.
- On the MCDU, push the line key (4R) adjacent to the applicable Specific tests indication.
- Push the line key (2L) adjacent to the ECU RELAY 1+2 CTRL:
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(1) If fault light located on the Engine Panel Unit (115VU) is illuminated:
- Replace the Relay (28KS1).
(a) If the fault continues:
- Remove the EIU
- Do a check for a ground signal at pin E2 of the EIU rack-connector AA:
1 If there is a ground signal:
_
- replace the EIU (1KS1) (Ref. AMM TASK 73-25-34-000-040) and (Ref. AMM TASK 73-25-34-400-040).
2 If there is no ground signal:
_
- Repair the wiring between EIU connector AA and 28KS1 (Ref. ASM 73-25/08).
(2) If fault light located on the Engine Panel Unit (115VU) is not illuminated:
- Replace the Relay (27KS1).
(a) If the fault continues:
- Replace the Relay (28KS1).
(b) If the fault continues:
- Remove the EIU
- Do a check for a ground signal at pin E2 of the EIU rack-connector AA:
1 If there is a ground signal:
_
- replace the EIU (1KS1) (Ref. AMM TASK 73-25-34-000-040) and (Ref. AMM TASK 73-25-34-400-040).
2 If there is no ground signal:
_
- Remove the 28KS1
- Do a check for a ground signal: . at pin C of the 28KS1 connector A: . at pin Z of the 28KS1 connector A:
a If there is no ground signal:
_ - repair the wiring as required
b If there is a ground signal:
_
- Do a check of continuity between pin 6 of 28KS1 connector A and pin E2 of the EIU rack-connector AA:
* If there is no continuity:
- repair the wiring between EIU and 28KS1 (Ref. ASM 73-25/08)
* If there is continuity:
- remove 27KS1
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- do a check for a 28V at pin X of the 27KS1 connector A: ** If there is 28V:
- repair the wiring between SEC1/2 and 27KS1 (Ref. ASM 73-25/23)
** If there is not 28V:
- repair the wiring as required (Ref. ASM 73-25/23)
B. Do the test given in Para. 3.A.
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TASK 73-20-00-810-981
Spurious TCMA Arming on Engine 2
1. Possible Causes
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- Relay (28KS2)
- EIU (1KS2) 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 发动机燃油和控制 2
