{"airworthiness_class":"Experimental","airworthiness_date":"2013-02-28","airworthiness_ops":"Amateur built","category":"conventional","cert_issue_date":"2025-10-06","city":"HELENA","country_code":"US","county_code":"049","cruise_speed_mph":null,"data_date":"2026-09-25","documents":[],"eng_mfr_mdl":"41575","engine_horsepower":180,"engine_maker":"LYCOMING","engine_model":"O-360 SERIES","engine_thrust_lb":0,"expiration_date":"2032-10-31","fractional_owner":0,"is_company":1,"is_electric":0,"is_unmanned_cert":0,"kit_mfr":"SMITH AVIATION","kit_model":"L21","last_action_date":"2025-10-06","maker":"Marshall Daniel R","maker_country":null,"maker_raw":"MARSHALL DANIEL R","maker_segment":null,"mfr_mdl_code":"05617SQ","mode_s_code":"51276763","mode_s_hex":"A57DF3","model":"L-21","n_number":"N453HC","name":"TUMBLING MIRTH MT LLC","num_engines":1,"other_names":"","plain_english":"N453HC is a Marshall Daniel R L-21, a fixed-wing airplane with one motor with a piston engine, built in 2005. It has 2 seats. It is registered to Tumbling Mirth Mt LLC, an LLC in Helena, Montana. The registration is valid: it was issued on October 6, 2025 and expires on October 31, 2032. It holds an experimental airworthiness certificate for amateur built, dated February 28, 2013.","region":"Northwest Mountain","region_code":"S","registrant_type":"LLC","registrant_type_code":"7","seats":2,"serial_number":"001","source":"FAA Civil Aviation Registry, Releasable Aircraft Database","state":"MT","status":"Valid registration","status_code":"V","status_short":"Valid","street":"PO BOX 758","street2":"","type_aircraft":"Fixed-wing, single engine","type_aircraft_code":"4","type_engine":"Piston (reciprocating)","type_engine_code":"1","unique_id":"00110539","url":"https://staging.data.eflight.com/aircraft/N453HC","watchlist_group":null,"watchlist_note":null,"weight_class":"","year_mfr":2005,"zip":"596240758"}