# SDR 2009FA0001014

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 3, 2009
- Submitted: December 4, 2009
- Operation: General aviation
- Aircraft: [N846QS](https://openairdocs.org/aircraft/N846QS), registered now
- Make and model: Cessna 560CESSNA
- Aircraft serial: 5600797
- Aircraft time: 663 hours, 527 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Cabin Pressure
- Condition: Malfunctioned
- Stage of operation: DE
- 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/2009FA0001014

## Discrepancy

PRESSURIZATION FAILED DURING THE DESCENT.  SYS WAS IN NORMAL, DIFFERENTIAL PRESSURE DROPPED TO NEAR ZERO, AND THE CONTROLLER RATE INDICATED ZERO THROUGHOUT.  ATTEMPTED TO CONTROL PRESSURIZATION MANUALLY WITH NO RESULT.

---
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.