# SDR SWAA102665

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 8, 2010
- Submitted: May 11, 2010
- Operation: Air carrier
- Aircraft: [N338SW](https://openairdocs.org/aircraft/N338SW), registered now
- Make and model: Boeing 737-3H4
- Registry model: [Boeing 737-3H4](https://openairdocs.org/model/boeing-737-3h4) (OpenAirDocs)
- Aircraft serial: 23960
- Aircraft time: 71,922 hours, 64,017 cycles
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Outflow Valve
- Part number: 7110035
- Part serial: 110292
- Condition: Malfunctioned
- Location: Cabin Pressure
- Stage of operation: CR
- 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/SWAA102665

## Discrepancy

DIVERSION / DECLARED EMERGENCY.  CABIN ALTITUDE WARNING HORN ACTIVATED AT FL 340 WHOLE IN CRUISE.  CABIN ALTITUDE REACHED 10,000 FEET.  OXYGEN MASKS NEVER DROPPED DUE TO AN IMMEDIATE EMERGENCY DESCENT DOWN TO 10,000 FEET MSL.  REMOVED AND REPLACED OUTFLOW VALVE PER MM.

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