# SDR ZZDA2009168

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 29, 2009
- Submitted: June 1, 2009
- Operation: Air carrier
- Aircraft: [N933AT](https://openairdocs.org/aircraft/N933AT), registered now
- Make and model: Boeing 717-200
- Registry model: [Boeing 717-200](https://openairdocs.org/model/boeing-717-200) (OpenAirDocs)
- Aircraft serial: 55071
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Part number: 92145A010101
- Part serial: 0122
- Condition: Inoperative
- Location: Cabin Pressure
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: B
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ZZDA2009168

## Discrepancy

DURING CLIMB THROUGH APPROX FL300, LEVEL 3 CABIN ALTITUDE ALERT APPEARED.  CONDUCTED EMERGENCY DESCENT PROCEDURE AS PER QRH & LEVELED OFF AT 10,000FT, CABIN ALTITUDE NEVER EXCEEDED APPROX 10,500FT ALTHOUGH CABIN RATE ALERT APPEARED SEVERAL TIMES DURING DESCENT.  REPLACED CABIN PRESSURE CONTROL PANEL, REF AMM 21-31-03.  OPS CHECK GOOD.  REMOVED AND REPLACED CABIN AIR OUTFLOW VALVE ACTUATOR AS PRECAUTIONARY, REF AMM 21-31, OPS CHECK GOOD.

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