# SDR U5OA201812281157

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 25, 2018
- Submitted: December 29, 2018
- Operation: Air carrier
- Aircraft: [N960D](https://openairdocs.org/aircraft/N960D), registered now
- Make and model: Gulstm GIV
- Aircraft serial: 1157
- Aircraft time: 9,362 hours, 4,022 cycles
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Outflow Valve
- Part number: 10274642
- Part serial: 19876
- Condition: Inoperative
- Location: Cabin Pressure
- Stage of operation: CL
- How discovered: 9
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/U5OA201812281157

## Discrepancy

UNABLE TO MAINTAIN CABIN PRESSURIZATION ON CLIMB OUT ABOVE 12,000 FEET IN AUTO OR MANUAL 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.