# N821N: 2018 Seb Aviation Montana SPORTSMAN GS-2

- Status: Valid registration
- Airframe: [Seb Aviation Montana SPORTSMAN GS-2](https://openairdocs.org/model/seb-aviation-montana-sportsman-gs-2) (registry code 05637SY, 4 seats)
- Engine: [Lycoming YIO-390 series](https://openairdocs.org/engine/lycoming-yio-390-series) (registry code 42418)
- Serial number: 7472
- Year built: 2018
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Kit: Glasair Aviation USA LLC SPORTSMAN GS-2
- Airworthiness: Experimental, amateur built
- Airworthiness date: August 3, 2018
- Certificate issued: August 2, 2018
- Expires: August 31, 2028
- Mode S code: AB35BE
- Registered owner: [Seb Aviation Montana LLC](https://openairdocs.org/faa-owner/SEB%20AVIATION%20MONTANA%20LLC)
- Location: [Missoula, MT](https://openairdocs.org/faa-place/MT/Missoula)
- Owner type: LLC
- Owner's area on the map: 46.7845° N, 113.9463° W: Placed by OpenAirDocs at the center of ZIP code 59803, within about 6 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=821N
- Page: https://openairdocs.org/aircraft/N821N

From the FAA registry file of October 24, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination. The registry lists only the engine series, so ADs for every Lycoming YIO-390 model are included.

## ADs that may apply (OpenAirDocs): 0 in force

### Matched by airframe (Seb Aviation Montana SPORTSMAN GS-2)

None in force.

### Matched by engine (Lycoming YIO-390 series)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N821N.

## FAA accident and incident reports (1)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Incident 20241214020779I](https://openairdocs.org/incident/20241214020779I), Dec 14, 2024: Seb Aviation Montana LLC SPORTSMAN GS-2 (N821N), Palm Beach Gard, FL, No damage. [privacy data omitted]Was enroute VFR from kbow to F45 departing at 1522 EST following completion of scheduled maintenance cycle that included removal of…

## Service difficulty reports

None filed for this aircraft. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

## STCs that may be installed (OpenAirDocs)

None matched to this aircraft's models.

## Related

- Other Seb Aviation Montana SPORTSMAN GS-2 aircraft: https://openairdocs.org/model/seb-aviation-montana-sportsman-gs-2/aircraft.md
- The Lycoming YIO-390 series engine: https://openairdocs.org/engine/lycoming-yio-390-series.md

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