# SDR 2016FA0000665

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 20, 2016
- Submitted: December 21, 2016
- Operation: General aviation
- Aircraft: N850VT
- Make and model: Socata TBM 700
- Registry model: [Socata TBM 700](https://openairdocs.org/model/socata-tbm-700) (OpenAirDocs)
- Aircraft serial: 389
- Aircraft time: 1,326 hours, 1,018 cycles
- System (JASC): [3520 · Passenger Oxygen System](https://openairdocs.org/jasc/3520)
- Part: Valve
- Part number: 449325
- Condition: No Test
- Location: Oxygen Sys
- Part time: 1,326 hours, 1,018 cycles
- 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/2016FA0000665

## Discrepancy

DURING ANNUAL INSPECTION, A FUNCTIONAL CHECK OF THE OXYGEN MASKS WAS PERFORMED. THE OXYGEN MASKS DROPPED AT 105000 FT INSTEAD OF 125. ALTIMETRIC VALVE REPLACED

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