# SDR 2011F00117

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 23, 2011
- Submitted: May 23, 2011
- Operation: General aviation
- Aircraft: [N965AS](https://openairdocs.org/aircraft/N965AS), registered now
- Make and model: Doug DC-9-83
- Registry model: [Doug DC-9-83](https://openairdocs.org/model/douglas-dc-9-83) (OpenAirDocs)
- Aircraft serial: 53079
- Aircraft time: 53,788 hours, 27,738 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Cabin Pressure
- Condition: Malfunctioned
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: B
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2011F00117

## Discrepancy

AIRCRAFT LOST PRESSURIZATION AT 35K, DESCENDED TO 14K AND PRESSURIZATION BEGAN TO RECOVER.  O2 MASK DID NOT DEPLOY AUTOMATICALLY OR MANUALLY WHEN SELECTED.

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