# SDR UPS04243376

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 20, 2004
- Submitted: October 22, 2004
- Operation: Air carrier
- Aircraft: N938UP
- Make and model: Boeing 727173C
- Aircraft serial: 19506
- System (JASC): [3510 · Crew Oxygen System](https://openairdocs.org/jasc/3510)
- Part: Oxygen Mask
- Condition: Inoperative
- Location: 2nd Observer
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS04243376

## Discrepancy

INSPECTION TYPE:N/A, 2ND OBSERVER O2 MASK INOP.  REMOVED AND REPLACED 2ND OBSERVER O2 MASK IAW 35-11-41.  OPS & LEAK CHECK GOOD.  PLACARD REMOVED.  DEFERRAL CLOSED (M289816).

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