# SDR 0001779949

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 12, 2000
- Submitted: May 16, 2000
- Operation: Air carrier
- Aircraft: N8928E
- Make and model: Doug DC-9-31
- Registry model: [Doug DC-9-31](https://openairdocs.org/model/douglas-dc-9-31) (OpenAirDocs)
- Aircraft serial: 45865
- Aircraft time: 59,341 hours, 64,598 cycles
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Outflow Valve
- Part number: 2075401AA
- Part serial: 94202
- Condition: Failed
- Location: Fuselage
- Part time: 529 hours, 454 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: I
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/0001779949

## Discrepancy

AUTOMATIC CABIN PRESSURE CONTROL FAILED EN ROUTE PIT.  FLIGHT DESCENDED TO 10,000 FEET AND PROCEEDED TO DESTINATION.  MAINTENANCE REPLACED THE OUTFLOW VALVE, THERMOSTAT, AND ANTICIPATOR AS A PRECAUTION.  NO FAULTS NOTED ON BITE TEST OF PRESSURE CONTROLLER.  AIRCRAFT RETURNED TO SERVICE.

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