- do a FADEC non motoring test (Ref. AMM TASK 73-29-00-710-040).
(a) Look for failure messages including the following words in FADEC test results and class 3 report (Ref. AMM TASK 73-21-60-740-026) : N2 SNSR, PS3, VSV, T25.
1 If any of those messages is present:
_
- do the trouble shooting procedure (Ref. TASK 70-00-00-810-801).
2 If no message is found:
_
- do the engine post stall inspection (Ref. AMM TASK 72-00-00-200-008).
(4) Do a detailed visual inspection of the VSV control linkage (Ref. AMM TASK 75-32-10-210-002) and look for any broken or loose components:
- repair or replace as required.
(5) 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).
(6) If trouble repeats:
- replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and (Ref.
AMM TASK 73-21-60-400-001). R
B. Do a minimum idle check to make sure that all engine instruments give the correct indication (Ref. AMM TASK 71-00-00-710-006).
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TASK 80-00-00-810-834
Slow Start Before Light off Sequence, on Engine 1 or 2
1. Possible Causes
_______________
- engine
- pneumatic starter
- starter shut off valve
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
R AMM 36-12-51-200-001 Remove and Check Auxiliary Power Unit Bleed
R Check-Valve (7260HM) for Condition AMM 71-00-00-000-042 Removal of the Power Plant AMM 71-00-00-400-042 Installation of the Power Plant AMM 71-00-00-710-003 Engine Automatic Start AMM 80-11-10-000-002 Removal of the Pneumatic Starter AMM 80-11-10-400-002 Installation of the Pneumatic Starter 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
_______________
A. If the fault symptom is identified by the crew observation: ENG1 or 2 -STARTING - slow start before light off sequence: - on the lower ECAM display unit, do a check of the starter air pressure
(at least 25 PSI)
- if no, make sure that the pack valves are off. Do a check to make sure that the air source pressure is sufficient (ground supply unit, APU).
(1) If the fault continues:
- do a check of the magnetic chip detectors for unwanted particles .
(2) If the fault continues:
- do a check to make sure that the core turns freely by handcranking.
(a) If a blockage occurs:
- try to turn the core each 15 mn for no more than 8 hours.
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(b) After you tried this, if again it is not possible to turn the core:
- replace the engine (Ref. AMM TASK 71-00-00-000-042) and (Ref. AMM TASK 71-00-00-400-042).
(3) If the fault continues:
- do a check of the APU bleed check valve (Ref. AMM TASK 36-12-51-200-001).
(4) If the fault continues:
- replace the pneumatic starter (Ref. AMM TASK 80-11-10-000-002) and (Ref. AMM TASK 80-11-10-400-002).
(5) If the fault continues:
- replace the starter shut off valve (Ref. AMM TASK 80-11-20-000-003) and (Ref. AMM TASK 80-11-20-400-003).
B. Do an engine automatic start procedure (Ref. AMM TASK 71-00-00-710-003).
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TASK 80-00-00-810-835
Failure of the Starter Shutoff Valve on Engine 1
1. Possible Causes
_______________
- EIU-1 (1KS1)
- aircraft wiring
- CTL SW-ENG/MASTER 1 (3KC) 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(7)
