# N55HP: 2018 Green Mountain State Avn SPORTSMAN GS-2

- Status: Valid registration
- Airframe: [Green Mountain State Avn SPORTSMAN GS-2](https://openairdocs.org/model/green-mountain-state-avn-sportsman-gs-2) (registry code 05637RM, 4 seats)
- Engine: [Lycoming YIO-390 series](https://openairdocs.org/engine/lycoming-yio-390-series) (registry code 42418)
- Serial number: 7473
- 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: June 6, 2018
- Certificate issued: June 1, 2018
- Expires: June 30, 2028
- Mode S code: A6FDCF
- Registered owner: [Green Mountain State Aviation LLC](https://openairdocs.org/faa-owner/GREEN%20MOUNTAIN%20STATE%20AVIATION%20LLC)
- Location: [Cornwall, VT](https://openairdocs.org/faa-place/VT/Cornwall)
- Owner type: LLC
- Owner's area on the map: 43.9978° N, 73.1783° W: Placed by OpenAirDocs at the center of ZIP code 05753, within about 5 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=55HP
- Page: https://openairdocs.org/aircraft/N55HP

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 (Green Mountain State Avn 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 N55HP.

## FAA accident and incident reports

None matched to N55HP.

## 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.

## Earlier aircraft with N55HP

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N55HP before.

- [Cancelled 2013-01-31](https://openairdocs.org/deregistered/N55HP-2013-01-31): Bell TH-13T, S/N 66-8126, built 1966. Sale reported, canceled. Owner: [Vivian, LA](https://openairdocs.org/faa-place/LA/Vivian)

## Related

- Other Green Mountain State Avn SPORTSMAN GS-2 aircraft: https://openairdocs.org/model/green-mountain-state-avn-sportsman-gs-2/aircraft.md
- The Lycoming YIO-390 series engine: https://openairdocs.org/engine/lycoming-yio-390-series.md

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