# SDR SWAA112857

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 17, 2011
- Submitted: April 20, 2011
- Operation: Air carrier
- Aircraft: [N353SW](https://openairdocs.org/aircraft/N353SW), registered now
- Make and model: Boeing 737-3H4
- Registry model: [Boeing 737-3H4](https://openairdocs.org/model/boeing-737-3h4) (OpenAirDocs)
- Aircraft serial: 24889
- Aircraft time: 66,862 hours, 57,812 cycles
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Part number: 7638106
- Part serial: 80A2381
- Condition: Faulty
- Location: Cabin Pressure
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA112857

## Discrepancy

DIVERSION / DECLARED EMERGENCY.  PRESSURIZATION FAILURE AT 34,000FT, CABIN ALT HORN CAME ON AND CABIN APPROACHED 13,000.  REMOVED AND REPLACED CABIN PRESSURE CONTROLLER AND MAIN OUTFLOW VALVE PER MM.

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