# SDR FDEA202608211213

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 21, 2026
- Submitted: August 24, 2026
- Operation: Air carrier
- Aircraft: [N928FD](https://openairdocs.org/aircraft/N928FD), registered now
- Make and model: Boeing 757-28A
- Registry model: [Boeing 757-28A](https://openairdocs.org/model/boeing-757-28a) (OpenAirDocs)
- Aircraft serial: 24369
- Aircraft time: 101,967 hours, 34,250 cycles
- System (JASC): [3510 · Crew Oxygen System](https://openairdocs.org/jasc/3510)
- Part: Oxygen Mask
- Part number: MF20108
- Part serial: 79402
- Condition: No Test
- Location: Zone 200
- 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/FDEA202608211213

## Discrepancy

DURING MX PREFLIGHT, CAPTAINS O2 MASK FAILED A PRESS  TO TEST.   PREMATURE REMOVAL/INSTALLATION.  REPLACED CAPT'S FULL FACE O2 MASK IAW AMM 35-11-51-4-99. OPS & LEAK CHKD GOOD. ACFT OK FOR SERVICE.

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