# SDR 97ZZZX4317

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 31, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N622DC](https://openairdocs.org/aircraft/N622DC), registered now
- Make and model: Beech 200BEECH
- Aircraft serial: BB491
- System (JASC): [3440 · Independent Position Determining System](https://openairdocs.org/jasc/3440)
- Part: Power Supply
- Part number: NCS31A
- Condition: Shorted
- Location: Cockpit R Nav
- Component: Collins, 339R1B
- Stage of operation: NR
- Nature of condition: J, B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97ZZZX4317

## Discrepancy

SMOKE AND AN ODOR NOTICED IN CABIN DURING FLIGHT.  A PRECAUTIONARY LANDING WAS MADE AT FRESNO AIRPORT.  AFTER LANDING, AIRCRAFT WAS GROUNDED AND A REPLACMENT AIRCRAFT AND MECHANIC WERE DISPATCHED.  THE MECHANIC TROUBLESHOT THE PROBLEM AND FOUND THAT R-NAV NCS 31A INDICATOR POWER SUPPLY HAD CREATED SMOKE AND BLOWN CIRCUIT BREAKER.  SYSTEM DISABLED AND CIRCUIT BREAKER BANDED.  OPS CHECK OF AIRCRAFT ELECTRICAL AND NAVIGATIONAL SYSTEMS WAS NORMAL.  AIRCRAFT RETURNED TO BASE WITH NO FURTHER PROBLEM.

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