# SDR G1IA202601194102

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 14, 2026
- Submitted: January 19, 2026
- Operation: Air carrier
- Aircraft: [N393GF](https://openairdocs.org/aircraft/N393GF), registered now
- Make and model: Beech B300
- Registry model: [Beech B300](https://openairdocs.org/model/hawker-beechcraft-b300) (OpenAirDocs)
- Aircraft serial: FL913
- Aircraft time: 6,964 hours, 6,017 cycles
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Outflow Valve
- Part number: 10364818
- Part serial: 93P0185
- Condition: Failed
- Location: Zone 100
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: B, G
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/G1IA202601194102

## Discrepancy

RAPID DECOMPRESSION AT FL310, IMMEDIATE LOSS OF CABIN PRESSURE TO A CABIN ALTITUDE AROUND 17,000 FT. DIFFERENTIAL SLOWLY DECREASED FROM THERE UNTIL THE DIFFERENTIAL WAS AT ZERO. WE WERE REQUIRED TO USE THE OXYGEN MASKS AND DESCEND TO 10,0000 FT. DURING DECENT IT WAS FOUND THAT THE CO-PILOT MIC IN THE OXYGEN MASK WAS NOT WORKING.

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