EFFECTIVITY
ALL CFM56-5B ENGINES FOR A319-A320-A321
CFMI PROPRIETARY INFORMATION CFDS MESSAGE
INTERROGATION
FAULT DETECTION
& ANNUNCIATION Page 42
Nov 02
CFM56-5B TRAINING MANUAL
NUMBER 1 BEARING ACCELEROMETER
CTC-231-086-00 ENGINE SYSTEMS - EVMU
EFFECTIVITY
ALL CFM56-5B ENGINES FOR A319-A320-A321
CFMI PROPRIETARY INFORMATION CFDS MESSAGE
INTERROGATION
FAULT DETECTION
& ANNUNCIATION Page 43
Nov 02
CFM56-5B TRAINING MANUAL
CENTRALIZED FAULT DISPLAY SYSTEM (CFDS). ENGINE SYSTEMS - EVMU.
The EVMU main menu is on 2 pages and provides access to various sub-menus.
The first page provides access to :
- Last leg report : Internal and external class 1 & 2 faults recorded during the last flight leg.
- Previous legs report : Internal and external class 1 & 2 faults recorded during the previous 63 flight legs, excluding the last flight.
- LRU identification : Provides part and serial number information.
- Class 3 failures : Provides a list of LRU’s detected faulty during a ground test. Only the last 3 detected failures are displayed.
- Test : Allows user to initiate a complete check of the EVM system and view the results.
The second page provides access to :
- Acc. reconfiguration : Allows selection of the accelerometer (Fan No1 bearing, or TRF) to be used for the next flight. The EVMU also indicates which accelerometer is in operation.
- Engine unbalance : Allows selection, per engine, of 5 different engine speeds (from 50% to 100% N1) at which unbalance data will be stored. Unbalance data acquired during the previous command can be read and trim balancing (one shot, or vectorial method) for both engines with both accelerometers can be performed.
- Frequency analysis : With this menu, the operator can set aquisition conditions for an in-flight frequency analysis. This menu also provides lines for comments (up to 3) that the operator considers necessary for the frequency analysis printout that will be made after the next flight.
EFFECTIVITY
ALL CFM56-5B ENGINES FOR A319-A320-A321
CFMI PROPRIETARY INFORMATION CFDS MESSAGE
INTERROGATION
FAULT DETECTION
& ANNUNCIATION Page 44
Nov 02
TRAINING MANUAL
CTC-231-087-00 EVMU MAIN MENU
EFFECTIVITY
ALL CFM56-5B ENGINES FOR A319-A320-A321
CFMI PROPRIETARY INFORMATION CFDS MESSAGE
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