{"airworthiness_class":"Experimental","airworthiness_date":"2025-08-27","airworthiness_ops":"Amateur built","category":"conventional","cert_issue_date":"2025-05-19","city":"TUCSON","country_code":"US","county_code":"019","cruise_speed_mph":null,"data_date":"2026-09-25","documents":[],"eng_mfr_mdl":"55607","engine_horsepower":100,"engine_maker":"ROTAX","engine_model":"912ULS","engine_thrust_lb":0,"expiration_date":"2032-05-31","fractional_owner":0,"is_company":0,"is_electric":0,"is_unmanned_cert":0,"kit_mfr":"SONEX AIRCRAFT LLC","kit_model":"ONEX","last_action_date":"2025-05-19","maker":"Ferstl Mark R","maker_country":null,"maker_raw":"FERSTL MARK R","maker_segment":null,"mfr_mdl_code":"056425U","mode_s_code":"52512267","mode_s_hex":"AA94B7","model":"ONEX","n_number":"N781EX","name":"FERSTL MARK R","num_engines":1,"other_names":"","plain_english":"N781EX is a Ferstl Mark R ONEX, a fixed-wing airplane with one motor with a piston engine, built in 2025. It has 1 seat. It is registered to an individual in Tucson, Arizona. The registration is valid: it was issued on May 19, 2025 and expires on May 31, 2032. It holds an experimental airworthiness certificate for amateur built, dated August 27, 2025.","region":"Western-Pacific","region_code":"4","registrant_type":"Individual","registrant_type_code":"1","seats":1,"serial_number":"ONX 0040","source":"FAA Civil Aviation Registry, Releasable Aircraft Database","state":"AZ","status":"Valid registration","status_code":"V","status_short":"Valid","street":"4142 E HOLMES ST","street2":"","type_aircraft":"Fixed-wing, single engine","type_aircraft_code":"4","type_engine":"Piston (reciprocating)","type_engine_code":"1","unique_id":"01499470","url":"https://staging.data.eflight.com/aircraft/N781EX","watchlist_group":null,"watchlist_note":null,"weight_class":"","year_mfr":2025,"zip":"857111931"}