# SDR KCSA202604281036

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 28, 2026
- Submitted: April 28, 2026
- Operation: Air carrier
- Aircraft: [N774CK](https://openairdocs.org/aircraft/N774CK), registered now
- Make and model: Boeing 777F1H
- Registry model: [Boeing 777F1H](https://openairdocs.org/model/boeing-777f1h) (OpenAirDocs)
- Aircraft serial: 66084
- Aircraft time: 30,498 hours, 4,200 cycles
- System (JASC): [3520 · Passenger Oxygen System](https://openairdocs.org/jasc/3520)
- Part: Oxygen Mask
- Condition: No Deploy
- 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/KCSA202604281036

## Discrepancy

O2 MASK IN UPPER CREW REST BUNK DID NOT DROP

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