{"airworthiness_class":"Standard","airworthiness_date":"","airworthiness_ops":"","category":"conventional","cert_issue_date":"2015-03-06","city":"BEAVER DAM","country_code":"US","county_code":"027","cruise_speed_mph":90,"data_date":"2026-09-25","documents":[],"eng_mfr_mdl":"17040","engine_horsepower":300,"engine_maker":"CONT MOTOR","engine_model":"TSIO-520 SER","engine_thrust_lb":0,"expiration_date":"2028-03-31","fractional_owner":0,"is_company":1,"is_electric":0,"is_unmanned_cert":0,"kit_mfr":"","kit_model":"","last_action_date":"2023-04-28","maker":"Cessna","maker_country":null,"maker_raw":"CESSNA","maker_segment":null,"mfr_mdl_code":"2076405","mode_s_code":"51304011","mode_s_hex":"A58809","model":"340A","n_number":"N4557N","name":"WESTRA AVIATION LLC","num_engines":2,"other_names":"","plain_english":"N4557N is a Cessna 340A, a fixed-wing airplane with more than one motor with a piston engine, built in 1978. It has 6 seats. It is registered to Westra Aviation LLC, an LLC in Beaver Dam, Wisconsin. The registration is valid: it was issued on March 6, 2015 and expires on March 31, 2028. It holds a standard airworthiness certificate.","region":"Great Lakes","region_code":"C","registrant_type":"LLC","registrant_type_code":"7","seats":6,"serial_number":"340A0547","source":"FAA Civil Aviation Registry, Releasable Aircraft Database","state":"WI","status":"Valid registration","status_code":"V","status_short":"Valid","street":"100 TOWER DR","street2":"","type_aircraft":"Fixed-wing, multi-engine","type_aircraft_code":"5","type_engine":"Piston (reciprocating)","type_engine_code":"1","unique_id":"00372914","url":"https://staging.data.eflight.com/aircraft/N4557N","watchlist_group":null,"watchlist_note":null,"weight_class":"","year_mfr":1978,"zip":"539169178"}