# SDR KCSA201806051139

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 5, 2018
- Submitted: June 5, 2018
- Operation: Air carrier
- Aircraft: [N710CK](https://openairdocs.org/aircraft/N710CK), registered now
- Make and model: Boeing 747-4B5F
- Registry model: [Boeing 747-4B5F](https://openairdocs.org/model/boeing-747-4b5f) (OpenAirDocs)
- Aircraft serial: 26406
- Aircraft time: 87,212 hours, 15,079 cycles
- System (JASC): [3520 · Passenger Oxygen System](https://openairdocs.org/jasc/3520)
- Part: Oxygen Mask
- Condition: No Test
- Stage of operation: IN
- How discovered: C
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/KCSA201806051139

## Discrepancy

CREW BUNK, L1, L2 OXYGEN MASKS DID NOT DEPLOY.

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