# SDR 9SUA2015072701

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 27, 2015
- Submitted: July 31, 2015
- Operation: Air carrier
- Aircraft: [N785JS](https://openairdocs.org/aircraft/N785JS), registered now
- Make and model: Cessna 525B
- Registry model: [Cessna 525B](https://openairdocs.org/model/cessna-525b) (OpenAirDocs)
- Aircraft serial: 525B0082
- Aircraft time: 7,703 hours, 5,439 cycles
- Engine: Wilint FJ44
- Engine time: 6,114 hours, 5,100 cycles
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Outflow Valve
- Part number: 52771339
- Part serial: 1054B
- Condition: Failed
- Location: Cabni Pressure
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: G, B, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/9SUA2015072701

## Discrepancy

CABIN ALTITUDE LIGHT CAME ON & CABIN CLIMBED TO 14,500 FEET.  RAPID CABIN DECOMPRESSION.  DECLARED AN EMERGENCY & LANDED WITHOUT INCIDENT.  DEFERRED THE CABIN PRESSURIZATION SYSTEM IAW MEL & THE AIRCRAFT WAS RELOCATED.  R & R THE PRIMARY OUTFLOW VALVE & ACCOMPLISHED AUTO & MANUAL PRESSURIZATION CHECKS.  OPERATIONS CHECKED GOOD.

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