# SDR 07FDEA04714

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 2, 2007
- Submitted: November 5, 2007
- Operation: Air carrier
- Aircraft: [N726FD](https://openairdocs.org/aircraft/N726FD), registered now
- Make and model: Airbus A300 B4-622R
- Registry model: [Airbus A300 B4-622R](https://openairdocs.org/model/airbus-a300-b4-622r) (OpenAirDocs)
- Aircraft serial: 575
- Aircraft time: 39,822 hours, 19,933 cycles
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Outflow Valve
- Part number: VST1650
- Part serial: AQ0022
- Condition: Failed
- Location: Cabin Air
- 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/07FDEA04714

## Discrepancy

OVBD FLOW EXTRACT FAN FAULT WENT OVERBOARD THEN LOST PRESSURIZATION.  DECLARED EMERGENCY DIVERTED TO  MEMPHIS, WARNING HORN BREAKER H60 PULLED FOR  MAINT PURPOSES.   FOUND VENT-EXTRACT FAN AND VALVES CNTL C/B TRIPPED.  RESETT. C/B TRIPPED WHEN VENT EXTRACT SELECTED OFF AND OVERBOARD EXTRACT VALVE TRIED TO DRIVE CLOSED.  REMOVED AND REPLACED OVERBOARD EXTRACT VALVE 75HR. IN REF TO A300-600 AMM. 21-23-13-4. OPS TEST NORMAL.

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