# SDR 99UAL900415

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 6, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N380UA
- Make and model: Boeing 737322
- Aircraft serial: 24655
- Engine: Ge CFM56*
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Condition: Malfunctioned
- Location: Cabin
- Component: Hamilton Sta, 106120910
- Stage of operation: CL
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/99UAL900415

## Discrepancy

LOST CABIN PRESSURE ON TAKEOFF.  *S/D*  COULD NOT CLOSE AFT OUTFLOW VALVE IN MANUAL AC OR DC.  REPLACED CABIN PRESSURE SELECTOR PANEL AND CABIN PRESSURE CONTROLLER.

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