# SDR SWAA020837

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 21, 2002
- Submitted: April 26, 2002
- Operation: Air carrier
- Aircraft: 082SW
- Make and model: Boeing 737-2H4
- Registry model: [Boeing 737-2H4](https://openairdocs.org/model/boeing-737-2h4) (OpenAirDocs)
- Aircraft serial: 22731
- Aircraft time: 63,740 hours, 69,211 cycles
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Outflow Valve
- Part number: 7110033
- Part serial: 171116
- Condition: Failed
- Location: Cabin Pressure
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: B, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA020837

## Discrepancy

DECLARED EMERGENCY, AIR TURNBACK.  DURING CLIMB ALTITUDE HORN SOUNDED, CABIN CLIMBING 1000 FPM.  STBY NO HELP, WORKED IN MANUAL.  REMOVED AND REPLACED AFT OUTFLOW VALVE PER MM.

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