# SDR DHL2000366004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 28, 2000
- Submitted: November 29, 2000
- Operation: Air carrier
- Aircraft: N366DH
- Make and model: Airbus A300 B4-203
- Registry model: [Airbus A300 B4-203](https://openairdocs.org/model/airbus-industrie-a300-b4-203) (OpenAirDocs)
- Aircraft serial: 249
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Outflow Valve
- Part serial: 724
- Condition: Failed
- Location: Nr 1
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: G
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DHL2000366004

## Discrepancy

IN CRUISE FLIGHT AT F/L 310 EXPERINCED LOSS OF CABIN PRESSURE.  NR 1 SYSTEM AFT VALVE WENT FULL OPEN.  ACTIVATED PAX O2 SYSTEM THEN RETURNED TO NORMAL.  REMOVED AND REPLACED NR 1 SYSTEM PRESS CONTROLLER PER M/M 21-31-00.

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