{"airworthiness_class":"Standard","airworthiness_date":"1969-01-29","airworthiness_ops":"Normal","category":"conventional","cert_issue_date":"1996-05-28","city":"IOWA CITY","country_code":"US","county_code":"103","cruise_speed_mph":142,"data_date":"2026-09-25","documents":[],"eng_mfr_mdl":"17025","engine_horsepower":300,"engine_maker":"CONT MOTOR","engine_model":"IO-360 SER","engine_thrust_lb":0,"expiration_date":"2030-04-30","fractional_owner":0,"is_company":0,"is_electric":0,"is_unmanned_cert":0,"kit_mfr":"","kit_model":"","last_action_date":"2023-10-20","maker":"Cessna","maker_country":null,"maker_raw":"CESSNA","maker_segment":null,"mfr_mdl_code":"2075717","mode_s_code":"52507711","mode_s_hex":"AA8FC9","model":"337D","n_number":"N78SM","name":"ZIMMERMAN GREGORY J","num_engines":2,"other_names":"DOWNES GREGORY J","plain_english":"N78SM is a Cessna 337D, a fixed-wing airplane with more than one motor with a piston engine, built in 1968. It has 6 seats. It is registered to co-owned owners in Iowa City, Iowa. The registration is valid: it was issued on May 28, 1996 and expires on April 30, 2030. It holds a standard airworthiness certificate for normal, dated January 29, 1969.","region":"Central","region_code":"3","registrant_type":"Co-owned","registrant_type_code":"4","seats":6,"serial_number":"337-1046","source":"FAA Civil Aviation Registry, Releasable Aircraft Database","state":"IA","status":"Valid registration","status_code":"V","status_short":"Valid","street":"301 KIRKWOOD AVE","street2":"","type_aircraft":"Fixed-wing, multi-engine","type_aircraft_code":"5","type_engine":"Piston (reciprocating)","type_engine_code":"1","unique_id":"00584820","url":"https://staging.data.eflight.com/aircraft/N78SM","watchlist_group":null,"watchlist_note":null,"weight_class":"","year_mfr":1968,"zip":"522404722"}