# N636MG: 1954 North American HARVARD MK IV

- Status: Valid registration
- Airframe: [North American HARVARD MK IV](https://openairdocs.org/model/north-american-harvard-mk-iv) (registry code 6400431, 2 seats)
- Engine: [Pratt & Whitney R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016)
- Serial number: 53-4636
- Year built: 1954
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Experimental, exhibition
- Airworthiness date: July 14, 2011
- Certificate issued: May 24, 2011
- Expires: May 31, 2027
- Mode S code: A85520
- Registered owner: [Airport Farms Aviation LLC](https://openairdocs.org/faa-owner/AIRPORT%20FARMS%20AVIATION%20LLC)
- Location: [Tarkio, MO](https://openairdocs.org/faa-place/MO/Tarkio)
- Owner type: LLC
- Owner's area on the map: 40.4460° N, 95.3581° W: Placed by OpenAirDocs at the center of ZIP code 64491, 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=636MG
- Page: https://openairdocs.org/aircraft/N636MG

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 Pratt & Whitney R1340 model are included.

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

### Matched by airframe (North American HARVARD MK IV)

None in force.

### Matched by engine (Pratt & Whitney R1340 series)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N636MG.

## FAA accident and incident reports

None matched to N636MG.

## 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 North American HARVARD MK IV aircraft: https://openairdocs.org/model/north-american-harvard-mk-iv/aircraft.md
- The Pratt & Whitney R1340 series engine: https://openairdocs.org/engine/pratt-whitney-r1340-series.md

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