# SDR HEEA979121

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 19, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N1202T](https://openairdocs.org/aircraft/N1202T), registered now
- Make and model: Bell 412
- Registry model: [Bell 412](https://openairdocs.org/model/bell-412) (OpenAirDocs)
- Aircraft serial: 33112
- System (JASC): [3457 · Global Positioning System](https://openairdocs.org/jasc/3457)
- Part: Receiver
- Part number: 81439000232
- Condition: Errors
- Location: Cockpit Gps
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HEEA979121

## Discrepancy

GPS RECEIVER PROVIDING HAZARDOUSLY MISLEADING INFORMATION TO THE FLIGHT CREW IS A MAJOR FAILURE CONDITION FOR THE AIRCRAFT.  SINGLE LATENT FAILURES OF CDI DEVIATION OUTPUT WIRES (SHORTED AND/OR OPEN) RESULT IN A NON-FLAGGED AND CENTERED DEVIATION BAR, INDICATING AN ON-COURSE LOCALIZER OR GLIDE SLOPE WITHOUT THE CAPABILITY OF DETECTING AND FLAGGING THE MALFUNCTION WITHOUT ALERTING THE COCKPIT CREW!  THIS CAN BE HAZARDOUSLY MISLEADING.

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