# SDR HNAA2009041500116

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 10, 2009
- Submitted: April 15, 2009
- Operation: Air carrier
- Aircraft: [N330EN](https://openairdocs.org/aircraft/N330EN), registered now
- Make and model: Dhav DHC8311
- Aircraft serial: 274
- Aircraft time: 35,792 hours, 41,534 cycles
- System (JASC): [3425 · Integrated Flight System](https://openairdocs.org/jasc/3425)
- Part: Ahrs
- Condition: Malfunctioned
- Location: Cockpit
- Stage of operation: TX
- How discovered: O
- Nature of condition: O
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HNAA2009041500116

## Discrepancy

NUMBER ONE ATTITUDE HEADING AND REFERENCE SYSTEM FAILED.  DATA INVALID MESSAGE.  CANNOT DUPLICATE.  ATTITUDE HEADING AND REFERENCE SYSTEM  SELF TEST CHECK GOOD.

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