# SDR UPS04141792

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 28, 2004
- Submitted: February 2, 2004
- Operation: Air carrier
- Aircraft: [N121UP](https://openairdocs.org/aircraft/N121UP), registered now
- Make and model: Airbus A300 B4-622R
- Registry model: [Airbus A300 B4-622R](https://openairdocs.org/model/airbus-a300-b4-622r) (OpenAirDocs)
- Aircraft serial: 0806
- System (JASC): [3510 · Crew Oxygen System](https://openairdocs.org/jasc/3510)
- Part: Oxygen Mask
- Part number: MF20501
- Part serial: 87513
- 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/UPS04141792

## Discrepancy

CREW AND ALL JUMPSEAT OXYGEN MASKS WILL NOT TEST.  FOUND NR 1 COURIER MASK NOT STOWED.  RESTOWED ALL MASKS, CHECK OK.  NR 1 COURIER 02 MASK INOP.  ENTERED DEFERRAL M274961 MEL 35-31-01 PLACARD INSTALLED, SEAT MUST BE UNOCCUPIED.  REPLACE 02 MASK PER MM TESTS OK CLEARED M274961.

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