# SDR UPS05M45578

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 8, 2005
- Submitted: October 10, 2005
- Operation: Air carrier
- Aircraft: [N253UP](https://openairdocs.org/aircraft/N253UP), registered now
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48439
- System (JASC): [3510 · Crew Oxygen System](https://openairdocs.org/jasc/3510)
- Part: Oxygen Mask
- Part number: MC1025104
- Part serial: 96834
- Condition: Inoperative
- Location: Cockpit
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS05M45578

## Discrepancy

INSPECTION TYPE:PS4,  F/O'S OXYGEN MASK REGULATOR FAILS PRESS TO TEST.  REMOVED AND REPLACED F/O'S OXYGEN MASK PER MM 35-13-01-4.

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