# SDR ASOA201000170

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 6, 2010
- Submitted: February 10, 2010
- Operation: Air carrier
- Aircraft: [N823AS](https://openairdocs.org/aircraft/N823AS), registered now
- Make and model: Cndair CL6002B19
- Aircraft serial: 7196
- Aircraft time: 28,637 hours, 25,565 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Selector Panel
- Condition: Malfunctioned
- Location: Cabin Pressure
- Stage of operation: CL
- 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/ASOA201000170

## Discrepancy

CLIMBING THRU FL 240 RECEIVED CABIN ALT CAUTION FOLLOWED BY CABIN ALT WARNING MESSAGES. CABIN ALT REACHED 10,800 DELTA P WAS NOT NOTED. INITIATED EMERGENCY DESCENT TO 10,000 MSGS EXTINGUISHED.  ACFT RETURNED TO DEPARTURE AFTER T/O -- EMERGENCY DECLARED.  R & R CABIN PRESSURE SELECTOR PANEL IAW AMM 21-31-10.  OPS CHECK GOOD.

---
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.