# SDR 98ZZZX349

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 15, 1997
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N340MT](https://openairdocs.org/aircraft/N340MT), registered now
- Make and model: Cessna 340A
- Registry model: [Cessna 340A](https://openairdocs.org/model/cessna-340a) (OpenAirDocs)
- Aircraft serial: 340A0741
- System (JASC): [3060 · Propeller/Rotor Anti-Ice/De-Ice System](https://openairdocs.org/jasc/3060)
- Part: Breaker
- Part number: W31X2M1620
- Condition: Failed
- Location: Propeller Deice
- Stage of operation: CL
- Nature of condition: B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/98ZZZX349

## Discrepancy

PROPELLER DE-ICE WAS SELECTED ON AIRCRAFT CLIMBING THROUGH SNOW FLURRIES.  THE PROPELLER DE-ICE PIGTAIL WIRES AT PROPELLER HUB WERE SHORTED TO THE SPINNER.  THIS CAUSED SMOKE IN THE COCKPIT.  AIRCRAFT RETURNED AND MADE AN UNEVENTFUL LANDING.  THE PROPELLER DE-ICE CIRCUIT BREAKER DID NOT TRIP TO THE OFF OR OPEN POSITION ALLOWING THE WIRING FROM THE CIRCUIT BREAKER TO THE DE-ICE GAUGE TO BURN IN TWO.

---
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.