# SDR SWAA2018032620665

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 21, 2018
- Submitted: March 26, 2018
- Operation: Air carrier
- Aircraft: [N7724A](https://openairdocs.org/aircraft/N7724A), registered now
- Make and model: Boeing 737-7BD
- Registry model: [Boeing 737-7BD](https://openairdocs.org/model/boeing-737-7bd) (OpenAirDocs)
- Aircraft serial: 36725
- Aircraft time: 28,525 hours, 14,431 cycles
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Outflow Valve
- Part number: 2079801
- Part serial: 0847093
- Condition: Malfunctioned
- Location: Cabin Pressure
- Stage of operation: CR
- 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/SWAA2018032620665

## Discrepancy

CABIN ALTITUDE WARNING HORN SOUNDED ALONG WITH CABIN ALTITUDE WARNING LIGHT ILLUMINATED.  AN EMERGENCY WAS DECLARED.   R & R THE EQUIPMENT COOLING OUTBOARD EXHAUST VALVE IAW MM.

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