(b) Check the Post Flight Report and FADEC Scheduled Maintenance Report and Class 3 Report (Ref. AMM TASK 73-21-60-740-007) for failure messages including the following words: VSV, T12, T25, PS3, HMU (FMV) VBV, RACSB or TBV or NACTB.
(c) If one of those messages is present:
- do the applicable trouble shooting procedure (Ref. TASK 70-00-00-810-801),
(d) If none of those messages is present:
- Do a visual check of the VSV cinematic system (actuators linkage, bolting, bellcranks, etc)
(e) If nothing is found:
- remove and check the IP check valve for correct condition and operation (Ref. AMM TASK 36-11-41-200-001).
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(f) If the IP check valve is not faulty:
- replace the HMU (Ref. AMM TASK 73-21-10-000-002) and (Ref. AMM TASK 73-21-10-400-002).
(g) If the fault continues:
- replace the ECU (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).
(2) If the engine stalled during an accel with no recovery or with recovery but abnormal engine parameters for the remaining of the flight:
(a) Do a check of the engine for Foreign Object Damage (FOD) or bird strike (Ref. AMM TASK 72-00-00-200-006).
(b) Do a check of the engine exhaust and stage 4 LPT blades for metallic debris presence.
(c) do an inspection of the Electrical Magnetic Chip Detectors (EMCD) (Ref. AMM TASK 79-00-00-281-002),
(d) Do a borescope inspection of the stage 4 booster blades (borescope port S0) (Ref. AMM TASK 72-21-00-290-003) and stage 1, 3, 8 HP Compressor blades (borescope ports S1, S3, S8) (Ref. AMM TASK 72-31-00-290-002)
(e) Do a borescope inspection of the HPT blades and stage 1 LPT blades (borescope port S17) (Ref. AMM TASK 72-52-00-290-001) and (Ref. AMM TASK 72-54-00-290-005).
(f) If nothing is found:
- Check the Post Flight Report and FADEC Scheduled Maintenance Report and Class 3 Report (Ref. AMM TASK 73-21-60-740-007) for failure messages including the following words: VSV, T12, T25, PS3, HMU (FMV).
(g) If one of those messages is present:
- do the applicable trouble shooting procedure (Ref. TASK 70-00-00-810-801),
(h) If none of those messages is present:
- Do a visual check of the VSV cinematic system (actuators linkage, bolting, bellcranks, etc)
(3) If the engine stalled during Take off at thrust reduction to Climb or on ground during decel from high thrust:
(a) Check the Post Flight Report and FADEC Scheduled Maintenance Report and Class 3 Report (Ref. AMM TASK 73-21-60-740-007) for failure messages including the following words: VSV, T25, PS3, HMU (FMV), VBV.
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_
- do the applicable trouble shooting procedure (Ref. TASK 70-00-00-810-801),
2 If none of those messages is present:
_
- Do a visual check of the VSV cinematic system (actuators linkage, bolting, bellcranks, etc)
3 If nothing is found:
_
- remove and check the IP check valve for correct condition and operation (Ref. AMM TASK 36-11-41-200-001).
4 If the IP check valve is not faulty:
_
- Do an engine gas path washing with pure water (Ref. AMM TASK 72-00-00-100-009).
NOTE : Deceleration stall margin on CFM56-5B engines may be
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本文鏈接地址：A320 Trouble Shooting Manual 排故手冊 發動機燃油和控制 1(29)
