# SDR UIEA2019111105885

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 7, 2019
- Submitted: November 11, 2019
- Operation: Air carrier
- Aircraft: [N1997A](https://openairdocs.org/aircraft/N1997A), registered now
- Make and model: Boeing 767-33A
- Registry model: [Boeing 767-33A](https://openairdocs.org/model/boeing-767-33a) (OpenAirDocs)
- Aircraft serial: 27310
- Aircraft time: 96,850 hours, 19,763 cycles
- System (JASC): [3510 · Crew Oxygen System](https://openairdocs.org/jasc/3510)
- Part: Oxygen Mask
- Part number: MC1025104
- Part serial: 99568
- Condition: Inoperative
- Location: Observer'S
- Stage of operation: TX
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2019111105885

## Discrepancy

FIRST OBSERVERS SEAT INOP. (<P>TRANSFERRED TO MDDR 120257 PER MEL 25-11-02-01A, CAT 'A'. </P><P>LP 1231530 - M6: REMOVED AND REPLACED 1ST OBSERVERS O2 MASK ASSY REF AMM 35-11-51. THIS CLEARS DMI 120257 AND COMPLETES W/O 58890.  </P>)

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