# SDR MALA040911

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 21, 2004
- Submitted: January 11, 2005
- Operation: Air carrier
- Aircraft: [N447XJ](https://openairdocs.org/aircraft/N447XJ), registered now
- Make and model: Saab 340B
- Registry model: [Saab 340B](https://openairdocs.org/model/saab-340b) (OpenAirDocs)
- Aircraft serial: 340B447
- Aircraft time: 14,804 hours, 16,114 cycles
- System (JASC): [3420 · Attitude and Direction Data System](https://openairdocs.org/jasc/3420)
- Part: Computer
- Part number: 6226190113
- Part serial: 2817
- Condition: Inoperative
- Location: Nr 1 Ahrs
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/MALA040911

## Discrepancy

A/P DISCONNECTED, A/C 10 DEG ROLL TO LEFT WITH A/P ENGAGED WITH NO TURN INTIATED, ROLL FLAG ON EADI, CAPTAINS EADI ROLLS CONTINOUSLY TO LEFT, HEADING ON CAPT'S SIDE DOES NOT MATCH MAG COMPASS OF F/O'S EHSI.  AIR RETURN TO DTW.  MAINTENANCE REMOVED AND REPLACED NR 1 AHRS COMPUTER P/N 622-6190-113, S/N OFF 2817, S/N ON 241.  OPS CHECK GOOD.

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