# SDR BSYA200700002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 9, 2007
- Submitted: January 31, 2007
- Operation: Air carrier
- Aircraft: N51LC
- Make and model: Lear 35A
- Registry model: [Lear 35A](https://openairdocs.org/model/gates-learjet-35a) (OpenAirDocs)
- Aircraft serial: 302
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Valve
- Part number: 660020756
- Condition: Malfunctioned
- Location: Cabin Pressure
- Stage of operation: TO
- How discovered: O
- Nature of condition: J
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/BSYA200700002

## Discrepancy

AIRCRAFT DEPARTED LCK AND WAS CLIMBING THRU 16,000 FT WHEN CABIN PRESSURIZATION STARTED TO CLIMB.  AIRCRAFT RETURNED TO LCK WHERE MAINTENANCE FOUND BAD SAFETY VALVE PRESSURIZATION DIFFERENTIAL VALVE.

---
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.