# SDR 5BMA201404010001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 30, 2014
- Submitted: April 1, 2014
- Operation: Air carrier
- Aircraft: N550SJ
- Make and model: Cessna S550
- Registry model: [Cessna S550](https://openairdocs.org/model/cessna-s550) (OpenAirDocs)
- Aircraft serial: S5500100
- Aircraft time: 10,180 hours, 8,554 cycles
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Outflow Valve
- Condition: Faulty
- Location: Cabin Pressure
- Stage of operation: CR
- 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/5BMA201404010001

## Discrepancy

DURING CRUISE AT FL360, & NOTICED A SLOW CABIN PRESSURIZATION LOSS.  CABIN ALTITUDE NEVER CLIMBED MORE THAN 500 FEET PER MINUTE.  PILOTS DONNED OXYGEN MASKS, STARTED DESCENDING & DECLARED AN EMERGENCY.  COMPLETED EMERGENCY CHECKLIST.  AS ACFT WAS COMING TO A REASONABLE ALTITUDE,  PAX OXYGEN MASKS DEPLOYED.  ELECTED TO DIVERT.  LANDED SAFELY. THE OUTFLOW VALVE WAS REPLACED & TEST FLIGHT CONDUCTED, OPERATIONS CHECKED OK.

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