# SDR FDEA201508162575

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 16, 2015
- Submitted: August 17, 2015
- Operation: Air carrier
- Aircraft: [N605FE](https://openairdocs.org/aircraft/N605FE), registered now
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48514
- Aircraft time: 742 hours, 17,262 cycles
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Actuator
- Part number: 27042844
- Condition: Malfunctioned
- Location: Outflow Valve
- Stage of operation: CR
- How discovered: O
- Nature of condition: J, E
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/FDEA201508162575

## Discrepancy

AT CRUISE FLIGHT AT FL380, RECEIVED A LEVEL 3 CABIN ALTITUDE.  QRH ACTION AVIONICS FAN OVRD CORRECTED PROBLEM.  AFTER APPROX 10 MINUTES PROBLEM RETURNED.  HAD TO INITIATE DESCENT TO FL320 TO MAINTAIN PRESS.  THERE WAS A SLIGHT VIBRATION UNDER THE CAPTAIN'S FLOOR AREA.  REPLACED OUTFLOW VLV ACTUATOR.

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