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E E . pins 35 and 36 (21 to 29 or 44 to 76 Ohms) . pins 18 and 37 (21 to 29 or 44 to 76 Ohms) . pins 16 and 17 (> 10 Megohms) . pins 35 and 17 (> 10 Megohms) . pins 18 and 17 (> 10 Megohms) . pin 16 and the ground (> 10 Megohms) . pin 35 and the ground (> 10 Megohms) . pin 18 and the ground (> 10 Megohms).
a If the resistance values are in the specified limits:
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- replace the ECU (4000KS), (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).
b If the resistance values are out of the specified limits:
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- replace the harness J8, (Ref. AMM TASK 73-21-50-000-041) and (Ref. AMM TASK 73-21-50-400-041).
(5) If the test gives the maintenance messages J7, HMU (FMVRES), ECU + J8, HMU (FMVRES), ECU (confirmed on both channel A and B):
- replace the Hydromechanical Unit (HMU), (Ref. AMM TASK 73-21-10-000-002) and (Ref. AMM TASK 73-21-10-400-002) right away for dual channel fault.
(a) If the fault messages repeat:
- Do the troubleshooting per steps 4.A.(3) and 4.A.(4).
B. Do the test given in Para. 3.A.(1).
(1) No additional maintenance action is required if the fault is not confirmed.
(2) Repeat the fault isolation procedure if the fault continues.
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Loss of the Feedback Signal from the FMV Resolver through the Two Channels on Engine 2
1. Possible Causes
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- Hydromechanical Unit (HMU)
- harness J7
- harness J8
- ECU (4000KS)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
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 73-21-50-000-040 Removal of the HJ7 Harness AMM 73-21-50-000-041 Removal of the HJ8 Harness AMM 73-21-50-210-002 Visual Inspection of the Wiring Harnesses AMM 73-21-50-400-040 Installation of the HJ7 Harness AMM 73-21-50-400-041 Installation of the HJ8 Harness 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
(ECU)(4000KS) AMM 73-29-00-710-040 Operational Test of the FADEC on the Ground (with Engine non Motoring)
3. Fault Confirmation
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A. Test
(1) Do the operational test of the FADEC 2A and 2B 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. Do this procedure:
NOTE : This fault is generated if one or both FMV resolver signals are
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out of range, invalid or the signals disagree.
(1) If the test does not give the maintenance messages J7, HMU (FMVRES), ECU + J8, HMU (FMVRES), ECU:
- replace the Hydromechanical Unit (HMU), (Ref. AMM TASK 73-21-10-000-002) and (Ref. AMM TASK 73-21-10-400-002). 中國航空網 www.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：A320 Trouble Shooting Manual 排故手冊 發動機燃油和控制 2(108)
