# SDR UIEA2018031400404

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 11, 2018
- Submitted: March 15, 2018
- Operation: Air carrier
- Aircraft: [N1321A](https://openairdocs.org/aircraft/N1321A), registered now
- Make and model: Boeing 767306
- Aircraft serial: 27957
- Aircraft time: 81,918 hours, 18,974 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Cabin Pressure
- Condition: Malfunctioned
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2018031400404

## Discrepancy

AT FL 370 CABIN ALTITUDE BEGAN A SLOW CLIMB, WITH OUTFLOW VALVE FULLY CLOSED.  DESCENDING TO FL 300 AND CABIN ALT STABILIZED AT 9000FT.   PERFORMED A BITE CHECK OR THE PRESSURE CONTROLLERS IAW AMM 21-31-00. OPS CHECKED GOOD.

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