# SDR SWAA2016121210358

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 7, 2016
- Submitted: December 13, 2016
- Operation: Air carrier
- Aircraft: N374SW
- Make and model: Boeing 737-3H4
- Registry model: [Boeing 737-3H4](https://openairdocs.org/model/boeing-737-3h4) (OpenAirDocs)
- Aircraft serial: 26582
- Aircraft time: 72,731 hours, 59,652 cycles
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Regulator
- Part number: 1074926
- Part serial: 415C
- Condition: Faulty
- Location: E&E Bay
- Stage of operation: UK
- How discovered: O
- Nature of condition: O
- Precautionary procedure: G, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2016121210358

## Discrepancy

DIVERSION/DECLARED EMERGENCY, FL 300 CABIN UNPRESSURIZED. NO VIBRATION OR BANG, PASSENGER O2 MASKS DEPLOYED. R&R NR 2 LOW STAGE REGULATOR PER MT & MM.

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