# SDR SWAA053648

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 13, 2005
- Submitted: November 17, 2005
- Operation: Air carrier
- Aircraft: [N749SW](https://openairdocs.org/aircraft/N749SW), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 29801
- Aircraft time: 23,557 hours, 13,378 cycles
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Part number: 71211997101AC
- Condition: Faulty
- 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/SWAA053648

## Discrepancy

DECLARED EMERGENCY.  CABIN ALTITUDE HORN SOUNDED ALONG WITH RAPID DECOMPRESSION & CABIN MASKS DROPPED.  CABIN PRESSURE CONTROLLABLE IN ALTERNATE MODE.  REMOVED AND REPLACED BOTH CABIN PRESSURE CONTROLLERS, CABIN AFT OUTFLOW VALVE & CABIN PRESSURIZATION CONTROL MODULE PER MM.

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