A320 Trouble Shooting Manual 排故手册 发动机燃油和控制 1(29)

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 - do a borescope inspection of the stage 5 booster blades (borescope port S05) (Ref. AMM TASK 72-21-00-290-003) at first maintenance opportunity within 25 hours or 10 cycles (whichever comes first), then proceed with the following procedure. End of SB 72-0391.
 Following trouble shooting procedure should be carried out if crew reported audible engine stall/surge while no ECAM warning ENG 1(2) STALL was set. This procedure covers engine stall conditions that occurred at N2 speed at or above idle. For engine stall during start, refer to (Ref. TASK 80-00-00-810-833).
 NOTE : Specific trouble shooting is required whether the stall occurred
____ during an accel or decel with the engine fully recovered or not after the stall(s) with no noticeable parameter shift.
 (1) If the engine stalled during taxi or during descent (on throttle reduction) or during an accel with recovery of engine parameters to normal:
 (a) Do a check of the engine for Foreign Object Damage (FOD) or bird strike (Ref. AMM TASK 72-00-00-200-006).

 (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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 F 『 E C F M E E E E 56 E E E 1 If one of those messages is present:

_
 - 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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