# SDR M3XA20250720004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 20, 2025
- Submitted: July 22, 2025
- Operation: Air carrier
- Aircraft: [N521RC](https://openairdocs.org/aircraft/N521RC), registered now
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 54496
- Aircraft time: 5,700 hours, 17,438 cycles
- System (JASC): [2100 · Air Conditioning System](https://openairdocs.org/jasc/2100)
- Part: Relay
- Part number: 389FXAXC124D
- Condition: Overheated
- Location: Zone 100
- Part time: 5,700 hours
- Stage of operation: CR
- How discovered: O
- Nature of condition: B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/M3XA20250720004

## Discrepancy

PILOT PERFORMED A PRECAUTIONARY LANDING FOR A BURNING SMELL IN THE CABIN. DURING INSPECTION OF THE ACFT THE MECHANIC FOUND A RELAY WITH SIGNS OF HIGH HEAT.  MECHANIC REPLACED RELAY PN 389FXAXC1-24D.  FUNCTION CHECK OK WITH NO FURTHER SMELL

---
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.