# SDR DALA2016050603778

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 4, 2016
- Submitted: May 9, 2016
- Operation: Air carrier
- Aircraft: N945DN
- Make and model: Doug MD-90-30
- Registry model: [Doug MD-90-30](https://openairdocs.org/model/mcdonnell-douglas-md-90-30) (OpenAirDocs)
- Aircraft serial: 53559
- Aircraft time: 37,889 hours, 31,850 cycles
- System (JASC): [3520 · Passenger Oxygen System](https://openairdocs.org/jasc/3520)
- Part: Oxygen Mask
- Condition: Unwanted Deploy
- Location: Cabin
- Stage of operation: CL
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2016050603778

## Discrepancy

THE CREW PERFORMED AN AIR TURN BACK.  ALL LT SIDE PASSENGER O2 MASKS DROPPED.  CABIN PRESSURIZATION NORMAL.  MAINTENANCE REPLACED R2-315 RELAY. RESTOWED MASKS AND PERFORMED DROP TEST IAW AMM.  ALL O2 MASKS DROPPED NOMALLY.  ALL OPERATIONS NORMAL.

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