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Sonex Ltd/Monnett John T Jr SONEX
N12SX is a Sonex Ltd/Monnett John T Jr SONEX, a fixed-wing airplane with one motor with a piston engine. It has 2 seats. It is registered to Eaa Aviation Foundation INC, a corporation in Oshkosh, Wisconsin. The registration is valid: it was issued on April 20, 2022 and expires on April 30, 2029. It holds an experimental airworthiness certificate for amateur built, dated June 6, 2002.
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Flight history: where it flew in the last seven days · follow it on the live map
Aircraft
- Maker
- Sonex Ltd/Monnett John T Jr
- Model
- SONEX
- Serial number
- 001
- Type
- Fixed-wing, single engineFAA type of aircraft code 4 (the FAA's broad category for the airframe). Every aircraft with this code · All codes
- Power
- Piston (reciprocating)FAA type of engine code 1 (what powers it, as the FAA classes engines). Every aircraft with this code · All codes, 1 motor
- Seats
- 2
- Year built
- Not given
- Transponder code
- A052FF (octal 50051377)
Registration
- Status
- Valid registrationFAA registration status code V (whether the registration certificate is in force). Every aircraft with this code · All codes
- Certificate issued
- April 20, 2022
- Expires
- April 30, 2029
- Last FAA action
- July 28, 2023
- Airworthiness
- ExperimentalFAA airworthiness class code 4 (the kind of airworthiness certificate it flies under and what it is approved for). Every aircraft with this code · All codes · Amateur builtFAA certificate purpose code 2 (the kind of airworthiness certificate it flies under and what it is approved for). All codes · June 6, 2002
- FAA region
- Great LakesFAA region code C (the FAA regional office that handles the record). All codes
- FAA record id
- 00147021
Owner as the FAA publishes it
- Name
- Eaa Aviation Foundation INC
- Type
- CorporationFAA type of owner code 3 (who holds the registration: a person, a company, a trust or a government body). Every aircraft with this code · All codes
- Address
- PO Box 3086
Oshkosh, WI 54903-3086
Owners can ask the FAA to withhold their name and address from public files. When they do, those fields are blank here as well. How that works.
Documents on file 0
No bills of sale, loans or other documents are indexed against this tail number.
Earlier use of this number 1
Connections how N12SX links to the rest of the register
- Sonex Ltd/Monnett John T Jr 1 aircraft on the register
- Eaa Aviation Foundation INC 65 aircraft in the fleet
- Oshkosh, WI 271 aircraft registered in this town
- Wittman Regional · OSH
- Wisconsin 6,164 aircraft registered
The whole map of how records connect · these connections as data: /graph/aircraft/N12SX.json.
Records check free · 1 to understand · 3 clear
The public federal record on N12SX, read the way a buyer, lender or insurer reads it: FAA registration, prior tail numbers keyed on the serial number, reuse of the tail number, recent registry filings, and the NTSB accident record under this and every earlier registration.
Valid registration to Eaa Aviation Foundation INC, a corporation, certificate issued April 20, 2022, expires April 30, 2029. No fractional interest recorded. [1]
Experimental certificate for amateur built; the FAA file gives no certificate date and no manufacture year. [1]
No earlier tail number is recorded against serial 001 for this model in the deregistered file. [2]
N12SX was previously assigned to 1 other aircraft: Bell 206A (serial 435, cancelled date not given). Histories keyed to the tail number alone can mix aircraft up; this check keys on the serial number. [2]
No bills of sale, loans or releases have reached the registry in recent weeks. The index covers only recent filings; older liens are in the records file. [3]
No NTSB investigation records located under N12SX. CLEAR means the query ran and returned nothing, not that nothing ever happened. [4]
These live in the FAA aircraft records file (every document ever filed against the aircraft) and, for larger aircraft, the International Registry. Part of the full report.
AD compliance against the logbooks and flight-activity reconciliation are researched layers of the full report.
- FAA Releasable Aircraft Database, master file, file of November 9, 2026. registry.faa.gov/
- FAA deregistered aircraft file (part of the same download), file of November 9, 2026. registry.faa.gov/
- FAA document index: registry documents received in recent weeks, file of November 9, 2026. registry.faa.gov/
- NTSB aviation accident database (CAROL), records through October 28, 2026. data.ntsb.gov/carol-main-public/basic-search
This automated check reads the public federal record. Nothing here is a legal opinion, an appraisal or a statement about the aircraft's condition; a CLEAR line is a statement about the searched record, not the aircraft.
Source: FAA Civil Aviation Registry, Releasable Aircraft Database, November 9, 2026. See this record on the FAA site · This record as data