CENTRALIZED FAULT DISPLAY SYSTEM (CFDS). FAULT CLASSIFICATION - AIRCRAFT.
Failures are classified by the aircraft according to three classes : Class 1, 2 and 3.
Class 1 failures.
Class 1 failures may have operational consequences on the current flight, or on subsequent ones. These failures are normally displayed in real time on the upper ECAM warning display. In some cases, the FWC applies inhibitions and failures are displayed in delayed time during critical flight phases when crew disruptions are not desired.
Class 1 failure warning messages are displayed in 3 levels, according to their severity and the required crew corrective action. Warning messages may also be associated with specific sounds.
- Display level 3 : Red warning. This corresponds to an emergency situation and the crew will have to take immediate corrective actions.
- Display level 2 : Amber caution. This corresponds to an abnormal situation and corrective action is not immediately required.
- Display level 1 : Caution. This level corresponds to an alert situation and the affected system must be monitored by the crew.
EFFECTIVITY
ALL CFM56-5B ENGINES FOR A319-A320-A321
CFMI PROPRIETARY INFORMATION
CFM56-5B TRAINING MANUAL
FAILURE CLASS 1 CLASS 2 CLASS 3
INDICATION TO THE FLIGHT CREW MESSAGE DISPLAYED IN
FLIGHT
- WARNING, CAUTION ON EWD - FLAGS
- LOCAL WARNINGS STATUS LIGHT FLASHING AT THE END OF THE FLIGHT NO INDICATION TO THE FLIGHT CREW
DISPATCH CONSEQUENCES MEL ENTRY :
"GO", "GO IF" OR "NO GO" MEL PREAMBLE : "GO" MEL NOT APPLICABLE
MAINTENANCE INFORMATION HAVE TO BE REPORTED BY THE PILOTS IN THE LOG BOOK. FAILURES INDICATED AT THE END OF EACH FLIGHT LEG. MEL ENTRY REQUIRED PRESENTED ON REQUEST, WHEN NEEDED. NO FIXED TIME FOR CORRECTION
CTC-231-066-00 AIRCRAFT FAULT CLASS ASSIGNMENTS
EFFECTIVITY
ALL CFM56-5B ENGINES FOR A319-A320-A321
CFMI PROPRIETARY INFORMATION CFDS MESSAGE
INTERROGATION
FAULT DETECTION
& ANNUNCIATION Page 3
Nov 02
CFM56-5B TRAINING MANUAL
CENTRALIZED FAULT DISPLAY SYSTEM (CFDS). MAINTENANCE MENU.
From the MCDU menu, selecting CFDS will display the first page of two maintenance menu pages. The first page provides access to :
- The Last Leg Report : This displays up to 40 failures (Class 1 & 2), which occurred during the last flight.
- Last Leg ECAM Report : This report displays a list of ECAM warning messages sent to the CFDIU, by the FWC’s. It can store up to 40 warnings, which occurred during the last flight.
- Previous Legs Report : At each new flight leg, the contents of the last leg report are transferred to the Previous Legs Report. It can store up to 200 failures recorded over the last 63 flights.
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