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- TOL : Time over limit during report generation. - TTP : Time to peak during report generation.
 
Engine mechanical advisory report <07>.
This report is generated when an exceedance of one of the following secondary engine parameters is detected on one engine :
- Engine oil temperature (OIT).
- Engine oil pressure (OIP).
- Vibrations of the engine LP rotor.
- Vibrations of the engine HP rotor.
The reason for the exceedance is displayed.
5 sets of parameters for one engine are recorded at 4 second intervals before the event, 12 sets at the event and 4 sets at 5 second intervals after the event.
The length of the pre-event and post-event intervals is programmable.
 

EFFECTIVITY
ALL CFM56-5B ENGINES FOR A319-A320-A321
CFMI PROPRIETARY INFORMATION AIDS MESSAGE
INTERROGATION
FAULT DETECTION
& ANNUNCIATION Page 16
Nov 02
  
 

 
  CFM56-5B TRAINING MANUAL

 
THE AIRCRAFT INTEGRATED DATA SYSTEM (AIDS).
Engine divergence report <09>.
This report is generated while in the climb, or cruise phases when, under stabilized conditions, any of the following engine divergence conditions is detected :
- EGT divergence exceeding a programmed
threshold.
- Nacelle temperature (TN) divergence exceeding a programmed threshold.
The reason for the divergence is displayed (EGT, TN).
This report is intended to detect quick degradation in engine performance.
3 sets of parameters for both engines are recorded at 2 second intervals before the event, 1 set at the event and 3 sets at 2 second intervals after the event.
In addition, the following data is provided :
- E : Divergent engine (1 or 2).
- DIV : Absolute divergence value of EGT, or TN. - REF : Reference delta value of EGT, or TN.
 
Engine start report <10>.
This report is generated in case of aborted engine start, or EGT exceedance.
The possible aborted start reasons are :
- Starter air valve, HP shut-off valve demand/position disagree.
- EGT overtemperature.
- Stall.
- No engine light off.
- Hung start.
- Illegal start sequence.
- Slow start.
3 sets of parameters for one engine are recorded at 5 second intervals before the event, 1 set at the event and 3 sets at 2 second intervals after the event.
The length of the pre-event and post-event intervals is programmable.
Note : The engine start report is also generated :
- every 25 engine cycles (programmable frequency).
- every flight leg for 5 consecutive flight legs from
initialization (programmable number up to 9).
 

EFFECTIVITY
ALL CFM56-5B ENGINES FOR A319-A320-A321
CFMI PROPRIETARY INFORMATION AIDS MESSAGE
INTERROGATION
FAULT DETECTION
　
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