# SDR 99ZZZX4406

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 16, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N45TF](https://openairdocs.org/aircraft/N45TF), registered now
- Make and model: Cessna 340A
- Registry model: [Cessna 340A](https://openairdocs.org/model/cessna-340a) (OpenAirDocs)
- Aircraft serial: 340A1507
- System (JASC): [2140 · Heating System](https://openairdocs.org/jasc/2140)
- Part: Heater
- Part number: B4500
- Condition: Dirty
- Location: Cockpit
- Stage of operation: NR
- Nature of condition: B, J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/99ZZZX4406

## Discrepancy

SMOKE AND FUMES IN COCKPIT WHEN HEATER TURNED TO FULL INCREASE.  HEATER OVERHEAT ANNUNCIATOR DISPLAYED.  POSSIBLE CAUSE:  DUST OR DIRT IN THE SYSTEM.  MECHANIC RESET CIRCUIT BREAKER AND OPERATIONALLY TESTED FOR 30 MINUTES WITH NO DEFECT OR MALFUNCTION.

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