# SDR AALA20160429011

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 29, 2016
- Submitted: May 3, 2016
- Operation: Air carrier
- Aircraft: N403A
- Make and model: Doug DC-9-82
- Registry model: [Doug DC-9-82](https://openairdocs.org/model/mcdonnell-douglas-dc-9-82) (OpenAirDocs)
- Aircraft serial: 49314
- Aircraft time: 85,135 hours, 46,138 cycles
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Actuator
- Part number: 20219742
- Part serial: 122494
- Condition: Faulty
- Location: Outflow Valve
- Part time: 36,065 hours, 18,700 cycles
- Stage of operation: UK
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA20160429011

## Discrepancy

AIRCRAFT WAS GNDED.  AIR INTERRUPT, EMER DECLARED, LANDING UNEVENTFUL & ACFT WAS OVERWEIGHT.  DURING FLIGHT, ACFT WOULD NOT PRESSURIZE & OUTFLOW VLV WAS OSCILLATING BACKWARD & FORTH.  R & R OUTFLOW VLV ACTUATOR & ACCOMPLISHED OPERATIONAL CHECK IAW AMM 21-32-05.

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