# SDR CVGA112792

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 5, 2011
- Submitted: October 6, 2011
- Operation: Air carrier
- Aircraft: [N135DA](https://openairdocs.org/aircraft/N135DA), registered now
- Make and model: Lear 35A
- Registry model: [Lear 35A](https://openairdocs.org/model/gates-learjet-35a) (OpenAirDocs)
- Aircraft serial: 35A405
- Aircraft time: 16,151 hours, 13,816 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Unknown
- Condition: Malfunctioned
- Location: Cabin Pressure
- Stage of operation: DE
- How discovered: O
- Nature of condition: O
- Precautionary procedure: G
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CVGA112792

## Discrepancy

CABIN PRESSURIZATION STARTED TO CLIMB AT A RATE OF 2000 FT PER MINUTE DURING DESCENT TO KLAS.  PASSING THROUGH FL280, A LOUD POP WAS HEARD AND RUSH OF AIR BEHIND AIRCREW AND CREW IMMEDIATELY DONNED O2 MASKS.  PASSING THROUGH FL220, REGAINED CONTROL OF PRESSURIZATION.

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