# SDR UPS99229852

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 15, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N942UP](https://openairdocs.org/aircraft/N942UP), registered now
- Make and model: Boeing 727-22C
- Registry model: [Boeing 727-22C](https://openairdocs.org/model/boeing-727-22c) (OpenAirDocs)
- Aircraft serial: 19101
- System (JASC): [3510 · Crew Oxygen System](https://openairdocs.org/jasc/3510)
- Part: Mask
- Condition: Leaked
- Location: Flight Deck
- 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/UPS99229852

## Discrepancy

INSPECTION TYPE:N/A, DURING CREW PREFLIGHT-CAPTAINS O2 MASK FAILED NEGATIVE PRESSURE CHECK AND ALTERNATE PREFLIGHT CHECK.  REMOVED AND REPLACED CAPTAINS O2 MASK.  SYSTEM CHECKS GOOD, LEAK CHECKS GOOD, REGULATORS CHECK GOOD.

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