# SDR 2005FA0000384

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 12, 2005
- Submitted: March 22, 2005
- Operation: General aviation
- Aircraft: [N858W](https://openairdocs.org/aircraft/N858W), registered now
- Make and model: Beech 58
- Registry model: [Beech 58](https://openairdocs.org/model/beech-58) (OpenAirDocs)
- Aircraft serial: TH2060
- System (JASC): [2140 · Heating System](https://openairdocs.org/jasc/2140)
- Part: Pressure Switch
- Part number: 94E422
- Condition: Intermittent
- Location: Heater
- Part time: 60 hours
- Component: Heater
- Component part number: B4500
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2005FA0000384

## Discrepancy

INVESTIGATED COMPLAINT OF COMBUSTION HEATER NOT OPERATING.  DURING TROUBLESHOOTING, FOUND COMBUSTION AIR SWITCH CONTINUITY INTERMITTENTLY CYCLING OPEN AND CLOSED DURING NORMAL OPERATING PRESSURES.  SWITCH DATE CODE: 9/02.  REPLACED COMBUSTION AIR SWITCH WITH NEW SWITCH, ALSO THERMOSTATIC SWITCH.  HEATER OPERATIONS, NORMAL. (K)

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