# SDR UIEA2020040100617

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 31, 2020
- Submitted: April 3, 2020
- Operation: Air carrier
- Aircraft: [N1399A](https://openairdocs.org/aircraft/N1399A), registered now
- Make and model: Boeing 767306
- Aircraft serial: 27959
- Aircraft time: 90,855 hours, 17,504 cycles
- System (JASC): [3510 · Crew Oxygen System](https://openairdocs.org/jasc/3510)
- Part: Oxygen Mask
- Part number: MC1025104
- Part serial: 11227
- 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/UIEA2020040100617

## Discrepancy

F/O'S O2 MASK WILL NOT INFLATE.(<P>SWAPPED O2 MASK FROM #3 PASSENGER SEAT IAW AMM 35-11-00. MASK OPERATED NORMAL (DEFECTIVE O2 MASK PN MC10-25-104, SN 11227). NOW PASSENGER #3 SEAT O2 MASK WILL NOT INFLATE. TRANSFERRED TO MDDR 126495 IAW AMM 25-25-03, CAT D, DUE DATE 29-JUL-20.</P><P>LP 1149897: REMOVED AND REPLACED OXYGEN MASK IAW AMM 35-11-51. THIS CLEARS MDDR 126495.<BR /></P><P><BR DATA-TEMP="1" /></P>)

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