# SDR CWQA20140923001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 23, 2014
- Submitted: September 25, 2014
- Operation: Air carrier
- Aircraft: N498AB
- Make and model: Cessna 560XL
- Registry model: [Cessna 560XL](https://openairdocs.org/model/cessna-560xl) (OpenAirDocs)
- Aircraft serial: 5605116
- Aircraft time: 6,985 hours, 5,029 cycles
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Outflow Valve
- Part number: 991240910
- Part serial: 440
- Condition: Malfunctioned
- Location: Cabin Pressure
- Part time: 6,985 hours, 5,029 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: G, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CWQA20140923001

## Discrepancy

DURING CRUISE CREW EXPERIENCED CABIN PRESSURIZATION FLUCTUATIONS & THEN LOSS OF CABIN PRESS CONTROL.  CHECK LIST FOLLOWED, EMER DECLARED, OXYGEN MASKS DEPLOYED, EMER DECENT & UNSCHEDULED LANDING PERFORMED WITHOUT INCIDENT.  PRIMARY OUTFLOW VLV REPLACED PN 9912409-10 SN 440.  OPERATIONS CHECKED GOOD.

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