# SDR UPS00233566

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 11, 2000
- Submitted: August 14, 2000
- Operation: Air carrier
- Aircraft: N951UP
- Make and model: Boeing 727-25C
- Registry model: [Boeing 727-25C](https://openairdocs.org/model/boeing-727-25c) (OpenAirDocs)
- Aircraft serial: 19850
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Condition: Inoperative
- Location: Cabin Pressure
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS00233566

## Discrepancy

INSPECTION TYPE:N/A AIR TURNBACK - CABIN CLIMBING UNCONTROLLABLE WITH EITHER AUTO OR MANUAL PRESS TROLLER.  DEFER CABIN PRESSURE CONTROL SYS AUTO/MAN MODES PER MEL 21-16-1-3.

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