# SDR SWAA075156

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 19, 2007
- Submitted: October 22, 2007
- Operation: Air carrier
- Aircraft: [N334SW](https://openairdocs.org/aircraft/N334SW), registered now
- Make and model: Boeing 737-3H4
- Registry model: [Boeing 737-3H4](https://openairdocs.org/model/boeing-737-3h4) (OpenAirDocs)
- Aircraft serial: 23938
- Aircraft time: 64,247 hours, 58,576 cycles
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Part number: 7638106
- Part serial: 860776
- Condition: Overheated
- Location: Cabin Pressure
- Stage of operation: CL
- How discovered: O
- Nature of condition: M, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA075156

## Discrepancy

AIR TURNBACK / DECLARED EMERGENCY.  PASSING 10,000 MSL CREW REPORTED STRONG BURNING SMELL IN CABIN.  SMELL INTENSIFIED AND REMAINED UNTIL AFTER LANDING AND SHUT DOWN.  FOUND CABIN PRESSURE CONTROLLER OVERHEATING.  REMOVED AND REPLACED PRESSURE CONTROLLER PER MM.

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