# SDR 9JLA2021051829344

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 8, 2021
- Submitted: May 18, 2021
- Operation: Air carrier
- Aircraft: [N400TC](https://openairdocs.org/aircraft/N400TC), registered now
- Make and model: Beech 400A
- Registry model: [Beech 400A](https://openairdocs.org/model/hawker-beechcraft-400a) (OpenAirDocs)
- Aircraft serial: RK225
- Aircraft time: 9,360 hours, 7,456 cycles
- System (JASC): [3510 · Crew Oxygen System](https://openairdocs.org/jasc/3510)
- Part: Oxygen Mask
- Part number: 17425292
- Part serial: 10710
- Condition: Broken
- Location: Cockpit
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/9JLA2021051829344

## Discrepancy

THE FLIGHT CREW REPORTED THAT A SMALL PIECE OF CO-PILOTS OXYGEN MASK SEPARATED FROM THE MASK ASSEMBLY. THE PLANNED FLIGHT WAS CANCELLED. THE MAINTENANCE TEAM REMOVED THE DEFECTIVE CO-PILOTS OXYGEN P/N 174252-92 S/N10710 AND INSTALLED AN OVERHAULED MASK ASSEMBLY. THE AIRCRAFT WAS RETURNED TO SERVICE. TOTAL TIME IN SERVICE 709.3 HRS

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