A. If the test does not give a maintenance message:
- on the lower ECAM display unit, do a check for low pressure in the starter air duct (at least 30 PSIG)
- replace the pneumatic starter (Ref. AMM TASK 80-11-10-000-002) and (Ref. AMM TASK 80-11-10-400-002).
(1) 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 an engine automatic start procedure (Ref. AMM TASK 71-00-00-710-003).
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EGT Above the Limits on Engine 1 or 2
1. Possible Causes
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- FWC-1 (1WW1)
- FWC-2 (1WW2)
- lower left-hand thermocouple lead assembly
- lower right-hand thermocouple lead assembly
- upper left-hand thermocouple lead assembly
- three-probe thermocouple lead assembly
- upper extension lead
- lower extension lead
- main junction box assembly
- ECU (4000KS)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 31-53-34-000-001
R AMM 31-53-34-400-001
AMM AMM 71-00-00-710-006 72-00-00-200-008
AMM AMM 73-21-60-000-001 73-21-60-400-001
AMM 73-29-00-710-040
R AMM AMM AMM AMM AMM AMM AMM AMM 77-21-10-000-008 77-21-10-000-009 77-21-10-000-025 77-21-10-000-026 77-21-10-000-027 77-21-10-000-028 77-21-10-000-029 77-21-10-200-002
R AMM AMM AMM AMM 77-21-10-400-008 77-21-10-400-009 77-21-10-400-025 77-21-10-400-026
F EEFF : ALL E E ECES Removal of the Flight Warning Computer (FWC) (1WW1,1WW2) Installation of the Flight Warning Computer (FWC) (1WW1,1WW2)Minimum Idle CheckInspection/Check After the Engine has Exceeded the Operational LimitsRemoval of the Electronic Control Unit (ECU)(4000KS)Installation of the Electronic Control Unit (ECU)(4000KS)Operational Test of the FADEC on the ground (with Engine Motoring)Removal of the Upper Extension LeadRemoval of the Lower Extension Lead Removal of the Main Junction BoxRemoval of the Upper Right Thermocouple Lead AssemblyRemoval of the Lower Left Thermocouple Lead AssemblyRemoval of the Upper Left Thermocouple Lead AssemblyRemoval of the Lower Right Thermocouple Lead AssemblyInspection/Check of the T495 Thermocouple Wiring HarnessInstallation of the Upper Extension LeadInstallation of the Lower Extension Lead Installation of the Main Junction BoxInstallation of the Upper Right Thermocouple Lead Assembly
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AMM 77-21-10-400-027 Installation of the Lower Left Thermocouple Lead Assembly AMM 77-21-10-400-028 Installation of the Upper Left Thermocouple Lead Assembly R AMM 77-21-10-400-029 Installation of the Lower Right Thermocouple Lead
Assembly
AMM 80-11-20-000-003 Removal of the Starter Shutoff Valve
AMM 80-11-20-400-003 Installation of the Starter Shutoff Valve
3. Fault Confirmation
__________________
A. Test
(1) Not applicable, the fault is evident.
4. Fault Isolation
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A. If the fault symptom is identified by the message START FAULT-EGT OVERLIMIT on the upper ECAM display unit and if the EGT is more than 725.C:
(1) Do the inspection/check after overshoot of engine operational limits (Ref. AMM TASK 72-00-00-200-008).
(2) Do the operational test of the FADEC on the ground (with engine motoring) (Ref. AMM TASK 73-29-00-710-040).
(3) Do a check of the air pressure for the starter (at least 30 PSIG).
(4) Replace the starter shutoff valve (Ref. AMM TASK 80-11-20-000-003) and (Ref. AMM TASK 80-11-20-400-003).
(5) Do an inspection/check of the T495 thermocouple wiring harness for isolation of the defective part (Ref. AMM TASK 77-21-10-200-002): 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 STARTING 起动(5)
