# SDR 2026FA0000647

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 17, 2026
- Submitted: August 17, 2026
- Operation: General aviation
- Aircraft: [N706GA](https://openairdocs.org/aircraft/N706GA), registered now
- Make and model: Gulstm GVI
- Aircraft serial: 87106
- Aircraft time: 206 hours, 60 cycles
- System (JASC): [3520 · Passenger Oxygen System](https://openairdocs.org/jasc/3520)
- Part: Line
- Part number: 80874301
- Part serial: D25042264
- Condition: Leaking
- Location: Zone 200
- Part time: 206 hours, 60 cycles
- Component: Psu Oxygen Box
- Component part number: 80874301
- 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/2026FA0000647

## Discrepancy

WHILE CARRYING OUT OXYGEN FOLLOW ONS, LARGE OXYGEN LEAK HEARD FROM BEHIND PSU. UPON DROPPING PSU, OXYGEN LINE FOUND TO NOT BE FULLY CONNECTED TO OXYGEN BOX. ONCE OXYGEN LINE WAS RECONNECTED TO OXYGEN BOX, OXYGEN BOX WAS FOUND TO HAVE A LARGE LEAK AND IS US.2.DURING OXYGEN FOLLOW ONS, MULTIPLE OXYGEN MASKS FAILED TO DEPLOY. SUBSEQUENT INVESTIGATION HAS FOUND THAT THE PSU CLOSE OUT PANELS ARE FITTED TO TIGHT TO THE PSU. OXYGEN BOX ASSEMBLY DO NOT HAVE ENOUGH FORCE TO PUSH THE PANELS OFF. A TOTAL OF 8 PSU CLOSE OUT PANELS REQUIRE ADJUSTMENT IN ORDER TO DEPLOY OXYGEN MASKS.

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