{"airworthiness_class":"Experimental","airworthiness_date":"1996-12-04","airworthiness_ops":"Exhibition","category":"conventional","cert_issue_date":"2021-03-19","city":"WILMINGTON","country_code":"US","county_code":"003","cruise_speed_mph":112,"data_date":"2026-09-25","documents":[],"eng_mfr_mdl":"67020","engine_horsepower":1475,"engine_maker":"WRIGHT","engine_model":"R-1820 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":"2025-11-05","maker":"Grumman","maker_country":null,"maker_raw":"GRUMMAN","maker_segment":null,"mfr_mdl_code":"3951008","mode_s_code":"50665547","mode_s_hex":"A36B67","model":"S2F-1","n_number":"N31957","name":"MARINE AVIATION MUSEUM INC","num_engines":2,"other_names":"","plain_english":"N31957 is a Grumman S2F-1, a fixed-wing airplane with more than one motor with a piston engine, built in 1957. It has 4 seats. It is registered to Marine Aviation Museum INC, a corporation in Wilmington, Delaware. The registration is valid: it was issued on March 19, 2021 and expires on March 31, 2028. It holds an experimental airworthiness certificate for exhibition, dated December 4, 1996.","region":"Eastern","region_code":"1","registrant_type":"Corporation","registrant_type_code":"3","seats":4,"serial_number":"133242","source":"FAA Civil Aviation Registry, Releasable Aircraft Database","state":"DE","status":"Valid registration","status_code":"V","status_short":"Valid","street":"5305 LIMESTONE RD STE 200","street2":"","type_aircraft":"Fixed-wing, multi-engine","type_aircraft_code":"5","type_engine":"Piston (reciprocating)","type_engine_code":"1","unique_id":"00034682","url":"https://staging.data.eflight.com/aircraft/N31957","watchlist_group":null,"watchlist_note":null,"weight_class":"","year_mfr":1957,"zip":"198081247"}