a If one or more message is present:
_ - do the troubleshooting related to the failure message(s).
b If nothing is found:
_
- replace the Hydromechanical Unit (HMU) (Ref. AMM TASK 73-21-10-000-002) and (Ref. AMM TASK 73-21-10-400-002).
- replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).
(2) If the N2 overlimit is not confirmed through the data contained in the Specific Data Report (Ref. AMM TASK 73-21-60-740-027) or AIDS data, or DFDR data and if the crew did not report the N2 indication flashing amber on the upper ECAM display unit or actual N2 exceedance.
- Do a check of the FWC part number via the LRU identification screen on the MCDU (Ref. AMM TASK 31-32-00-860-001). If the FWC part number is 350E017248685, the warning is spurious and should be disregarded.
- no further maintenance action is required.
B. Do a minimum idle check (Ref. AMM TASK 71-00-00-710-006).
(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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Fluctuation of N1 or Auto Acceleration or Auto Deceleration or No Throttle Response to TLA Command on Engine 1 or 2
1. Possible Causes
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- T12 Sensor
- HMU
- J7 harness
- J8 harness
- N1 Sensor
- N2 Sensor
- ECU (4000KS)
- J7 Harness
- J8 Harness
- J9 Harness
- J10 Harness
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 73-21-10-000-002
AMM 73-21-10-400-002
AMM 73-21-40-000-001
AMM 73-21-40-400-001
AMM 73-21-50-000-040
AMM 73-21-50-000-041
AMM 73-21-50-000-042
AMM 73-21-50-000-043
AMM 73-21-50-210-002
AMM 73-21-50-400-040
AMM 73-21-50-400-041
AMM 73-21-50-400-042
AMM 73-21-50-400-043
AMM 73-21-60-000-001
AMM 73-21-60-400-001
AMM 73-21-60-740-007
AMM 73-29-00-710-040
AMM 77-11-10-000-002
AMM 77-11-10-400-002
AMM 77-11-20-000-002
AMM 77-11-20-400-002
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R E ECES Removal of the Hydromechanical Unit (HMU)Installation of the Hydromechanical Unit (HMU)Removal of the T12 Temperature SensorInstallation of the T12 Temperature SensorRemoval of the HJ7 HarnessRemoval of the HJ8 HarnessRemoval of the HJ9 HarnessRemoval of the HJ10 HarnessVisual Inspection of the Wiring HarnessesInstallation of the HJ7 HarnessInstallation of the HJ8 HarnessInstallation of the HJ9 HarnessInstallation of the HJ10 HarnessRemoval of the Electronic Control Unit (ECU)(4000KS)Installation of the Electronic Control Unit (ECU)(4000KS)Correct Time Limited Faults (Non Asterisked) of the Engine Scheduled Maintenance ReportOperational Test of the FADEC on the Ground (with Engine non Motoring)Removal of the N1 Speed Sensor (4000EV)Installation of the N1 Speed Sensor (4000EV)Removal of the N2 Speed Sensor (4001EV).Installation of the N2 Speed Sensor (4001EV).
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3. Fault Confirmation
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A. Test Do the operational test of the FADEC 1A and 1B on the ground (with engine non - motoring) (Ref. AMM TASK 73-29-00-710-040).
NOTE : If the fluctuation of N1 is reported simultaneously on all
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