Service experience has indicated that the flap position provided by the flap control data unit (FCDU) can fail on one or more computer channels. The failure is often intermittent which makes trouble shooting difficult and time consuming. Dispatch of the aircraft is not allowed prior to correction of the failure.
A modification has been developed which eliminates the failure mode and reduces shop visits substantially.
Modified FCDU (in front) compared to the current FCDU design
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Benefits:
- Improves reliability and dispatch performance
- Reduction of FCDU shop repairs and NFF( No failure found)
- Intermittent failure eliminated
- Enhanced rigid casing design
- Extensively tested
- No modification to the aircraft required
- Pay-back within one shop visit
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