# SDR 97UAL900056

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 19, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N980UA](https://openairdocs.org/aircraft/N980UA), registered now
- Make and model: Boeing 737291
- Aircraft serial: 21545
- Engine: Pwa JT8D9A
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Condition: Malfunctioned
- Location: Cabin
- Component: Hamilton Sta, 763810
- 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/97UAL900056

## Discrepancy

UNABLE TO PRESSURIZE AIRCRAFT USING AUTO AND STANDBY MODE USING ENG PNEUMATICS AND BOTH PACKS.  FWD OUTFLOW CLOSED LIGHT AND AUTO FAILED LIGHT WAS ON.  *S/D*  CABIN PRESSURE CONTROLLER FAILED.  REPLACED CONTROLLER AND CABIN PRESSURE SELECTOR PANEL, OPS CHECK GOOD.

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