{"airworthiness_class":"","airworthiness_date":"","airworthiness_ops":"","category":"conventional","cert_issue_date":"1987-07-21","city":"NIWOT","country_code":"US","county_code":"013","cruise_speed_mph":null,"data_date":"2026-09-25","documents":[],"eng_mfr_mdl":"","engine_horsepower":null,"engine_maker":"","engine_model":"","engine_thrust_lb":null,"expiration_date":"2027-10-31","fractional_owner":0,"is_company":0,"is_electric":0,"is_unmanned_cert":0,"kit_mfr":"","kit_model":"","last_action_date":"2026-07-01","maker":"Oneill Terrence","maker_country":null,"maker_raw":"ONEILL TERRENCE","maker_segment":null,"mfr_mdl_code":"05612FT","mode_s_code":"50334311","mode_s_hex":"A1B8C9","model":"Z","n_number":"N21SR","name":"ONEILL TERRENCE","num_engines":1,"other_names":"","plain_english":"N21SR is an Oneill Terrence Z, a fixed-wing airplane with one motor with a piston engine. It has 4 seats. It is registered to an individual in Niwot, Colorado. The registration is valid: it was issued on July 21, 1987 and expires on October 31, 2027. No airworthiness certificate is on file, which is normal for drones and for aircraft still being built or tested.","region":"Northwest Mountain","region_code":"S","registrant_type":"Individual","registrant_type_code":"1","seats":4,"serial_number":"1","source":"FAA Civil Aviation Registry, Releasable Aircraft Database","state":"CO","status":"Valid registration","status_code":"V","status_short":"Valid","street":"7659 NIKAU DR","street2":"","type_aircraft":"Fixed-wing, single engine","type_aircraft_code":"4","type_engine":"Piston (reciprocating)","type_engine_code":"1","unique_id":"00775580","url":"https://staging.data.eflight.com/aircraft/N21SR","watchlist_group":null,"watchlist_note":null,"weight_class":"","year_mfr":null,"zip":"805038671"}