# SDR UPS99230369

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 19, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N951UP
- Make and model: Boeing 727-25C
- Registry model: [Boeing 727-25C](https://openairdocs.org/model/boeing-727-25c) (OpenAirDocs)
- Aircraft serial: 19850
- System (JASC): [3510 · Crew Oxygen System](https://openairdocs.org/jasc/3510)
- Part: Regulator
- Condition: Malfunctioned
- Location: Cockpit
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS99230369

## Discrepancy

F/E OXYGEN EMERGENCY SWITCH STICKS IN THE ON POSITION.  REMOVED AND REPLACED FLIGHT ENGINEER'S 02 REGULATOR PER MM 35-11-31.  LEAK AND OPS CHECK GOOD.

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