# N439SM: 2008 Airmax Construcoes Aeronautica SEAMAX-M22

- Status: Valid registration
- Airframe: [Airmax Construcoes Aeronautica SEAMAX-M22](https://openairdocs.org/model/airmax-construcoes-aeronautica-seamax-m22) (registry code 0600047, 2 seats)
- Engine: [Rotax 912ULS series](https://openairdocs.org/engine/rotax-912uls-series) (registry code 55572)
- Serial number: 66
- Year built: 2008
- Type: Fixed wing single engine
- Engine type: 4 cycle
- Airworthiness: Experimental, operating light-sport, previously under 21.190
- Airworthiness date: February 12, 2016
- Certificate issued: January 27, 2021
- Expires: January 31, 2028
- Mode S code: A54629
- Registered owner: [Sea2it LLC](https://openairdocs.org/faa-owner/SEA2IT%20LLC)
- Location: [Ossining, NY](https://openairdocs.org/faa-place/NY/Ossining)
- Owner type: LLC
- Owner's area on the map: 41.1944° N, 73.8253° W: Placed by OpenAirDocs at the center of ZIP code 10562, within about 2 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=439SM
- Page: https://openairdocs.org/aircraft/N439SM

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 Rotax 912ULS model are included.

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

### Matched by airframe (Airmax Construcoes Aeronautica SEAMAX-M22)

None in force.

### Matched by engine (Rotax 912ULS series)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N439SM.

## 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 20240918021519I](https://openairdocs.org/incident/20240918021519I), Sep 18, 2024: Airmax Construcoes SEAMAX-M22 (N439SM), Lagrangeville, NY, Minor damage. PIC intended to land aircraft at kpou and reported a landing gear issue. PIC diverted to Sky Acres Airport (44N) where he landed gear up on the grass adjacent…

## 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 Airmax Construcoes Aeronautica SEAMAX-M22 aircraft: https://openairdocs.org/model/airmax-construcoes-aeronautica-seamax-m22/aircraft.md
- The Rotax 912ULS series engine: https://openairdocs.org/engine/rotax-912uls-series.md

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