# SDR HYIA20251010001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 8, 2025
- Submitted: October 10, 2025
- Operation: Air carrier
- Aircraft: [N223PB](https://openairdocs.org/aircraft/N223PB), registered now
- Make and model: Cessna 402C
- Registry model: [Cessna 402C](https://openairdocs.org/model/cessna-402c) (OpenAirDocs)
- Aircraft serial: 402C0105
- Aircraft time: 41,418 hours, 41,289 cycles
- System (JASC): [2197 · Air Conditioning System Wiring](https://openairdocs.org/jasc/2197)
- Part: Switch
- Condition: Shorted
- Location: Zone 200
- Stage of operation: CR
- How discovered: O
- Nature of condition: B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HYIA20251010001

## Discrepancy

PILOT REPORTED THE AUXILIARY CABIN FAN SWITCH FELT HOT WITH A BURNING SMELL AND NOTED SPARKS. COMPANY MAINTENANCE INSPECTED AND FOUND A BURNT WIRE TERMINAL. THE TERMINAL WAS REPLACED WITH NO FURTHER DEFECTS NOTED.

---
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.