3. Fault Confirmation
__________________
A. Do the operational test of the FADEC 2B on the ground (with engine motoring) (Ref. AMM TASK 73-29-00-710-040).
4. Fault Isolation
_______________
A. If the test gives the maintenance message BSV, J11/J12, ECU:
- do a check for open or short to ground of the harness J11 and J12 between the ECU (4000KS) and the 6 o'clock junction box, between the 6 o'clock junction box and the BSV pins J11 and J12/9, 23, 24 and pins CJ11L and CJ12L/1, 2 (Ref. ASM 73-25/18) (Ref. AWM 71-51-08).
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(1) If the wiring is not correct:
- repair the above defective wiring.
(2) If the wiring is correct:
- disconnect the harness CJ11L and CJ12L from the BSV. Install a jumper wire between the pins 1 and 2 on the harness CJ11L and CJ12L.
- disconnect the connector J11 and J12 from the ECU 2 (4000KS) and do a check of the harness J11 and J12 resistance between: . pins 9 and 23 (< 5 Ohms) . pins 9 and 24 (> 10 Megohms) . pin 9 and the ground (> 10 Megohms).
(a) If the resistance values are in the specified limits:
- replace the burner staging valve (BSV) (Ref. AMM TASK 73-11-70-000-002) and (Ref. AMM TASK 73-11-70-400-002).
(b) If the resistance values are out of the specified limits:
- disconnect the harness J11 and J12 from the junction box at the 6 o'clock strut and do a check of the harness CJ11L and CJ12L resistance between: for the harness CJ11L . pins 8 and 10 (< 5 Ohms) . pins 8 and 9 (> 10 Megohms) . pin 8 and the ground (> 10 Megohms) for the harness CJ12L . pins 16 and 15 (< 5 Ohms) . pins 16 and 5 (> 10 Megohms) . pin 16 and the ground (> 10 Megohms).
1 If the resistance values are in the specified limits:
_
- replace the harness J11 (Ref. AMM TASK 73-21-50-000-044) and (Ref. AMM TASK 73-21-50-400-044).
- replace the harness J12 (Ref. AMM TASK 73-21-50-000-045) and (Ref. AMM TASK 73-21-50-400-045).
2 If the resistance values are out of the specified limits:
_
- replace the harness CJ11L (Ref. AMM TASK 73-21-50-000-025) and (Ref. AMM TASK 73-21-50-400-025).
- replace the harness CJ12L (Ref. AMM TASK 73-21-50-000-027) and (Ref. AMM TASK 73-21-50-400-027).
(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 73-10-00-810-833
Failure of the BSV Valve on Engine 1
1. Possible Causes
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- burner staging valve (BSV)
- harness J8
- Hydromechanical Unit (HMU)
- ECU (4000KS)
2. Job Set-up Information
______________________
A. Referenced Information
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REFERENCE DESIGNATION
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AMM 72-41-00-290-001 Borescope Inspection of the Combustion Chamber Liners, Dome Areas,High Pressure Turbine Nozzle Vanes and Shrouds (as far as visible through two opposite ports)
AMM 72-51-00-290-004 Borescope Inspection of High-Pressure Turbine Nozzle
Assembly
AMM 73-11-70-000-002 Removal of the Burner Staging Valve (BSV)
AMM 73-11-70-400-002 Installation of the Burner Staging Valve (BSV)
AMM 73-21-10-000-002 Removal of the Hydromechanical Unit (HMU)
AMM 73-21-10-400-002 Installation of the Hydromechanical Unit (HMU)
AMM 73-21-50-000-041 Removal of the HJ8 Harness
AMM 73-21-50-400-041 Installation of the HJ8 Harness
R AMM 73-21-60-000-001 Removal of the Electronic Control Unit (ECU)(4000KS) AMM 73-21-60-400-001 Installation of the Electronic Control Unit R (ECU)(4000KS) AMM 73-29-00-710-040 Operational Test of the FADEC on the ground (with Engine Motoring) ASM 73-25/18
3. Fault Confirmation
__________________
A. Do the operational test of the FADEC 1B on the ground (with engine motoring) (Ref. AMM TASK 73-29-00-710-040).
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本文鏈接地址：A320 Trouble Shooting Manual 排故手冊 發動機燃油和控制 1(52)
