# SDR SWAA2017050813619

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 4, 2017
- Submitted: May 9, 2017
- Operation: Air carrier
- Aircraft: N378SW
- Make and model: Boeing 737-3H4
- Registry model: [Boeing 737-3H4](https://openairdocs.org/model/boeing-737-3h4) (OpenAirDocs)
- Aircraft serial: 26585
- Aircraft time: 72,806 hours, 58,871 cycles
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Outflow Valve
- Part number: 7110033
- Part serial: 154152
- Condition: Faulty
- Location: Cabin Pressure
- Stage of operation: UK
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2017050813619

## Discrepancy

DECLARED EMERGENCY, AT 36,000 CABIN ALT LIGHT ILLUMINATION AND CABIN HORN SOUNDED.  R&R MAIN OUTFLOW VALVE PER MM.

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