# SDR O2GA2015080582101

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 26, 2015
- Submitted: August 5, 2015
- Operation: Air carrier
- Aircraft: [N821UP](https://openairdocs.org/aircraft/N821UP), registered now
- Make and model: Beech B300
- Registry model: [Beech B300](https://openairdocs.org/model/hawker-beechcraft-b300) (OpenAirDocs)
- Aircraft serial: FL908
- Aircraft time: 978 hours, 826 cycles
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Part number: 13034612
- Part serial: 933503
- Condition: Defective
- Location: Cabin Pressure
- Part time: 978 hours, 826 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: G
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/O2GA2015080582101

## Discrepancy

AT 25,000' CRUISE THE ACFT SUDDENLY DEPRESSURIZED.  CABIN ALTITUDE INDICATED 25,000', WHITE ALT & RED CAB ALT LIGHTS ILLUMINATED.  PAX OXYGEN MASKS DEPLOYED, LIGHT ILLUMINATED & WARNING HORN SOUNDED.  ACFT LANDED SAFELY.  R & R THE CABIN PRESSURIZATION CONTROLLER & SECURED THE PAX OXYGEN MASKS.  A SUCCESSFUL SYS OPERATIONAL CHECK WAS PERFORMED.  ACFT WAS RETURNED TO SERVICE.

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