# SDR CWQA20141127001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 25, 2014
- Submitted: November 28, 2014
- Operation: Air carrier
- Aircraft: [N71NF](https://openairdocs.org/aircraft/N71NF), registered now
- Make and model: Lear 45LEAR
- Aircraft serial: 452058
- Aircraft time: 4,432 hours, 2,622 cycles
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Part number: 211985810
- Part serial: 66J0142
- Condition: Failed
- 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/CWQA20141127001

## Discrepancy

DURING CRUISE AT FL450, CREW RECEIVED CABIN ALTITUDE ALERT, FOLLOWED BY CABIN PRESSURIZATION LOSS.  CHECK LIST FOLLOWED, EMER DECENT & UNSCHEDULED LANDING PERFORMED WITHOUT INCIDENT.  MX EVALUATION & FOUND CABIN PRESSURIZATION CONTROLLER AT FAULT.  R & R CABIN PRESSURIZATION CONTROLLER OFF PN 2119858-10 SN 66-J0142.

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