# SDR 2004FA0000794

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 8, 2004
- Submitted: October 8, 2004
- Operation: General aviation
- Aircraft: N2328E
- Make and model: Beech B200
- Registry model: [Beech B200](https://openairdocs.org/model/beech-b200) (OpenAirDocs)
- Aircraft serial: BB1608
- Engine: Pwa PT6*
- System (JASC): [3422 · Directional Gyro and Indicating System](https://openairdocs.org/jasc/3422)
- Part: Indicator
- Part number: ST3400
- Part serial: 1432
- Condition: Malfunctioned
- Location: Taws/Rmi
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2004FA0000794

## Discrepancy

THE TAWS/RMI SHOWS SIGNIFICANT BEARING ERRORS ON HEADINGS GREATER THAN 350 DEGREES OR LESS THAN 0 DEGREES.  THIS PROBLEM WAS DISCOVERED IN FLIGHT AND VALIDATED THROUGH GROUND TESTING OF NUMEROUS UNITS.  PROBABLE CAUSE OF MALFUNCTION IS SOFTWARE.  THE ST3400 TAWS/RMI IS NOT RECOMMENDED FOR NAVIGATION AT THIS TIME.

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