# SDR 2011FA0000735

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 9, 2011
- Submitted: November 9, 2011
- Operation: General aviation
- Aircraft: [N500WR](https://openairdocs.org/aircraft/N500WR), registered now
- Make and model: Lear 31A
- Registry model: [Lear 31A](https://openairdocs.org/model/learjet-31a) (OpenAirDocs)
- Aircraft serial: 31038
- Aircraft time: 6,309 hours, 6,712 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Control Valve
- Part number: 2415010
- Part serial: 3H0026
- Condition: Failed
- Location: Cabin Pressure
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2011FA0000735

## Discrepancy

PILOT REPORTED PRESSURIZATION SYSTEM REVERTED TO UNCOMMANDED EMERGENCY PRESSURIZATION MODE.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.