# SDR UIEA2020062801431

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 28, 2020
- Submitted: June 29, 2020
- Operation: Air carrier
- Aircraft: [N662GT](https://openairdocs.org/aircraft/N662GT), registered now
- Make and model: Boeing 767-31A
- Registry model: [Boeing 767-31A](https://openairdocs.org/model/boeing-767-31a) (OpenAirDocs)
- Aircraft serial: 27619
- Aircraft time: 77,271 hours, 15,340 cycles
- System (JASC): [3510 · Crew Oxygen System](https://openairdocs.org/jasc/3510)
- Part: Oxygen Mask
- Part number: MC1025104
- Part serial: 54348
- Condition: Malfunctioned
- Location: Observers
- 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/UIEA2020062801431

## Discrepancy

2ND OBSERVER O2 MASK WILL NOT STOP FREE FLOWING DURING TEST.(<P>REMOVED AND REPLACED 2ND OBSERVER O2 MASK PER AMM 35-11-51. OPS CHECK GOOD.</P>)

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