# SDR FE62004F00000

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 27, 2004
- Submitted: September 24, 2004
- Operation: Air carrier
- Aircraft: [N2FQ](https://openairdocs.org/aircraft/N2FQ), registered now
- Make and model: Amd FALCON50MYST
- Aircraft serial: 167
- Engine: Garrtt TFE731*
- System (JASC): [3422 · Directional Gyro and Indicating System](https://openairdocs.org/jasc/3422)
- Part: Software
- Condition: Malfunctioned
- Location: Taws/Rmi
- Component: Taws/Rmi
- Component part number: ST3400
- 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/FE62004F00000

## Discrepancy

THE SANDEL TAWS/RMI SHOWS SIGNIFICANT BEARING ERRORS ON HEADINGS GREATER THAT 359 DEGREES OR LESS THAN 0 DEGREES.  THIS PROBLEM WAS DISCOVERED IN FLIGHT AND VALIDATED THROUGH GROUND TEST OF NUMEROUS UNITS.  PROBABLE CAUSE OF MALFUNCTION IS THE SOFTWARE.  THE ST34 TAWS/RMI IS NOT RECOMMENDED FOR NAVIGATION AT THIS TIME.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.