# SDR DXTA200702262

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 13, 2007
- Submitted: June 15, 2007
- Operation: Air carrier
- Aircraft: [N989QS](https://openairdocs.org/aircraft/N989QS), registered now
- Make and model: Cessna 750
- Registry model: [Cessna 750](https://openairdocs.org/model/cessna-750) (OpenAirDocs)
- Aircraft serial: 7500089
- Aircraft time: 6,840 hours, 4,393 cycles
- Engine: Allsn AE3007C
- System (JASC): [3150 · Central Warning](https://openairdocs.org/jasc/3150)
- Part: Warning Message
- Condition: Illuminated
- Stage of operation: CR
- How discovered: O
- Nature of condition: F
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA200702262

## Discrepancy

YD FAIL UPPER B CYAN CAS MESSAGE COME ON IN FLIGHT ABOUT 18,000 FT.   COULD NOT DUPLICATE SWAPPED A AND B YAW AUGMENTATION COMPUTERS. OPS CHECK GOOD WORK DONE IAW CESSNA 750 MM CH 27-24-07.

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