# SDR 99UAL900562

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 29, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N7258U
- Make and model: Boeing 727222
- Aircraft serial: 21405
- Engine: Pwa JT8D15
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Selector Panel
- Condition: Malfunctioned
- Location: Cabin Pressure
- Component: Hamilton Sta, 7110024
- 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/99UAL900562

## Discrepancy

CABIN NOT CONTROLLABLE IN AUTO, STANDBY OR MANUAL MODE.  RETURNED TO  ORD.  *S/D*  NO OBVIOUS CAUSE OF PROBLEMS WERE DETECTED DURING CHECK OF PRESSURIZATION SYSTEM  DURING MAINTENANCE.  REPLACED CABIN PRESSURE SELECTOR PANEL AS PRECAUTIONARY.

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