# N391BF: 2005 Field Burton M SONEX

- Status: Valid registration
- Airframe: [Field Burton M SONEX](https://openairdocs.org/model/field-burton-m-sonex) (registry code 05618RM, 2 seats)
- Engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999)
- Serial number: 0391
- Year built: 2005
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Kit: Sonex Ltd SONEX
- Airworthiness: Experimental, amateur built
- Airworthiness date: April 3, 2005
- Certificate issued: October 16, 2024
- Expires: October 31, 2031
- Mode S code: A4869F
- Registered owner: [Lear Eric T](https://openairdocs.org/faa-owner/LEAR%20ERIC%20T)
- Location: [Tomahawk, WI](https://openairdocs.org/faa-place/WI/Tomahawk)
- Owner type: Individual
- Owner's area on the map: 45.5074° N, 89.7454° W: Placed by OpenAirDocs at the center of ZIP code 54487, within about 10 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=391BF
- Page: https://openairdocs.org/aircraft/N391BF

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 (Field Burton M SONEX)

None in force.

### Matched by engine (Amateur-built UNKNOWN ENG)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N391BF.

## FAA accident and incident reports

None matched to N391BF.

## 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 Field Burton M SONEX aircraft: https://openairdocs.org/model/field-burton-m-sonex/aircraft.md
- The Amateur-built UNKNOWN ENG engine: https://openairdocs.org/engine/amateur-built-unknown-eng.md

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