# SDR 98UAL900321

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 11, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N952UA](https://openairdocs.org/aircraft/N952UA), registered now
- Make and model: Boeing 737522
- Aircraft serial: 26699
- Engine: Ge CFM56*
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Condition: Malfunctioned
- Location: Cabin
- Component: Hamilton Sta, 763810X
- Stage of operation: UK
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/98UAL900321

## Discrepancy

AUTO PRESSURIZATION FAILED AND CABIN ALTITUDE CLIMBED UNTIL CABIN ALTITUDE WARNING SOUNDED.  *S/D*  CABIN PRESSURE CONTROLLER SWITCHED TO STANDBY MODE AND AIRCRAFT REGAINED PRESSURIZATION CONTROL.  THE CABIN PRESSURE CONTROLLER AND PRESSURE CONTROL PANEL WERE REPLACED.

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