# N20577: Grenier Robert T KITFOX SERIES IV

- Status: Valid registration
- Airframe: [Grenier Robert T KITFOX SERIES IV](https://openairdocs.org/model/grenier-robert-t-kitfox-series-iv) (registry code 05614FI, 2 seats)
- Serial number: 4152394
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Kit: Skystar Acft Co KITFOX IV
- Airworthiness: Experimental, amateur built
- Airworthiness date: October 31, 2002
- Certificate issued: February 3, 2023
- Expires: February 28, 2030
- Mode S code: A1A803
- Registered owner: [Werdier Randy M](https://openairdocs.org/faa-owner/WERDIER%20RANDY%20M)
- Location: [Hibbing, MN](https://openairdocs.org/faa-place/MN/Hibbing)
- Owner type: Individual
- Owner's area on the map: 47.3352° N, 92.9543° W: Placed by OpenAirDocs at the center of ZIP code 55746, within about 11 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=20577
- Page: https://openairdocs.org/aircraft/N20577

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.

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

### Matched by airframe (Grenier Robert T KITFOX SERIES IV)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB NYC07CA230](https://openairdocs.org/ntsb/NYC07CA230), Sep 16, 2007: Grenier Kitfox IV (N20577), Moultonboro, NH, substantial damage. Probable cause: The failure of both spark plugs in the number 3 cylinder which resulted in a partial loss of engine power.

## FAA accident and incident reports (2)

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.

- [Accident 20070916829609A](https://openairdocs.org/incident/20070916829609A), Sep 16, 2007: N20577, Moultonboro, NH, Substantial damage. (-23) The pilot [privacy data omitted] was taking off from runway 20, (3600' paved) at moultonborough, NH (5M3). Lift-off and initial climb were normal. At…
- [Incident 20050808017609I](https://openairdocs.org/incident/20050808017609I), Aug 8, 2005: Amtr KITFOXIV (N20577), Ossippee Lake, NH, Substantial damage. (-23) On take off for Ossippee Lake NH - as soon as the a/c broke the water the a/c immediately tipped to the left with the left wing tip catching the water,…

## 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 N20577

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N20577 before.

- [Cancelled 1980-09-29](https://openairdocs.org/deregistered/N20577-1980-09-29): Cessna 172M, S/N 17261409, built 1973. Owner: [Futyma Steven S](https://openairdocs.org/faa-owner/FUTYMA%20STEVEN%20S), [Manchester, VT](https://openairdocs.org/faa-place/VT/Manchester)

## Related

- Other Grenier Robert T KITFOX SERIES IV aircraft: https://openairdocs.org/model/grenier-robert-t-kitfox-series-iv/aircraft.md

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