1 Replace the 3 fuel nozzles (position 1, 3 and 5) (Ref. AMM
_ TASK 73-11-40-000-002) and (Ref. AMM TASK 73-11-40-400-002).
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NOTE : Fuel nozzles (position 1, 3 and 5) are the most exposed
____ to contamination in case of fuel manifold coking.
a If the fault does not continue during subsequent flights:
_ NOTE : If the EGT exceedence is determined to be caused by
____ fuel manifold coking, then replacement of all other fuel nozzles as well as replacement of the fuel manifolds is required.
- Replace all Fuel nozzles except position 1, 3 and 5 (Ref. AMM TASK 73-11-40-400-002) and (Ref. AMM TASK 73-11-40-400-002).
- Replace the fuel manifold.
B. If the fault symptom is identified by the ECAM warning EGT OVER LIMIT, if the EGT overlimit is 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 there was a stall reported by the Crew or an ECAM warning STALL is printed in the Post Flight Report (PFR):
(1) Do the procedure after overshoot of the engine operational limits (Ref. AMM TASK 72-00-00-200-008).
(2) Do the troubleshooting related to ECAM warning STALL
C. If the fault symptom is identified by the ECAM warning EGT OVER LIMIT and if the EGT 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:
- Check the FWC part number via the LRU identification screen on the MCDU (Ref. AMM TASK 31-32-00-860-001).
(1) If the FWC part number is 350E017248685, the warning is spurious and should be disregarded. No further maintenance action is required.
D. 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) unless above troubleshooting requires an other engine test.
(1) No additionnal maintenance action is required if the fault is not confirmed.
(2) Repeat the fault isolation procedure if the fault continues.
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TASK 77-00-00-810-850
N1 Overlimit on Engine 1 or 2
1. Possible Causes
_______________
- Hydromechanical Unit (HMU)
- ECU (4000KS)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 31-32-00-860-001 Procedure to Get Access to the SYSTEM REPORT/TEST
Menu Page AMM 71-00-00-710-006 Minimum Idle Check AMM 72-00-00-200-008 Inspection/Check After the Engine has Exceeded the
Operational Limits 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 73-21-60-000-001 Removal of the Electronic Control Unit (ECU) AMM 73-21-60-400-001 Installation of the Electronic Control Unit (ECU) AMM 73-21-60-740-007 Correct Time Limited Faults (Non Asterisked) of the
Engine Scheduled Maintenance Report AMM 73-21-60-740-027 Read the Specific Data Report R 77-00-00-991-004 Fig. 201
3. Fault Confirmation
__________________
A. Test
(1) On the MCDU, read (if available) the Specific Data Report (Ref. AMM TASK 73-21-60-740-027) to note the max N1 value that was recorded during the event as well as the duration of the exceedence (if available from crew report). If not, read or get the data from the DFDR or QAR.
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4. Fault Isolation
_______________
R (Ref. Fig. 201/TASK 77-00-00-991-004)
A. Do this procedure:
NOTE : The ECAM warning is triggered if the indicated N1 is greater than 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 发动机指示(74)
