{"airworthiness_class":"Standard","airworthiness_date":"1957-01-18","airworthiness_ops":"","category":"conventional","cert_issue_date":"2026-03-02","city":"MILWAUKEE","country_code":"US","county_code":"079","cruise_speed_mph":131,"data_date":"2026-09-25","documents":[{"collateral_type":"Aircraft","doc_type":"Bill of sale (evidence of ownership)","party":"","receipt_date":"2026-08-31"},{"collateral_type":"Aircraft","doc_type":"Bill of sale (evidence of ownership)","party":"","receipt_date":"2026-08-31"}],"eng_mfr_mdl":"17015","engine_horsepower":225,"engine_maker":"CONT MOTOR","engine_model":"E225 SERIES","engine_thrust_lb":0,"expiration_date":"2033-03-31","fractional_owner":0,"is_company":0,"is_electric":0,"is_unmanned_cert":0,"kit_mfr":"","kit_model":"","last_action_date":"2026-03-02","maker":"Beech","maker_country":null,"maker_raw":"BEECH","maker_segment":null,"mfr_mdl_code":"1151516","mode_s_code":"51210603","mode_s_hex":"A51183","model":"G35","n_number":"N4257D","name":"PETERSON DUANE T","num_engines":1,"other_names":"","plain_english":"N4257D is a Beech G35, a fixed-wing airplane with one motor with a piston engine. It has 4 seats. It is registered to an individual in Milwaukee, Wisconsin. The registration is valid: it was issued on March 2, 2026 and expires on March 31, 2033. It holds a standard airworthiness certificate, dated January 18, 1957. 2 documents are on file: 2 \u00d7 bill of sale (evidence of ownership).","region":"Great Lakes","region_code":"C","registrant_type":"Individual","registrant_type_code":"1","seats":4,"serial_number":"D-4485","source":"FAA Civil Aviation Registry, Releasable Aircraft Database","state":"WI","status":"Valid registration","status_code":"V","status_short":"Valid","street":"5240 S 37TH ST","street2":"","type_aircraft":"Fixed-wing, single engine","type_aircraft_code":"4","type_engine":"Piston (reciprocating)","type_engine_code":"1","unique_id":"00461854","url":"https://staging.data.eflight.com/aircraft/N4257D","watchlist_group":null,"watchlist_note":null,"weight_class":"","year_mfr":null,"zip":"532213002"}