{"airworthiness_class":"Restricted","airworthiness_date":"1973-06-07","airworthiness_ops":"Agriculture and pest control; Forest; Other; Aerial surveying; Patrolling; Aerial advertising","category":"conventional","cert_issue_date":"2021-09-21","city":"FRANKLIN","country_code":"US","county_code":"213","cruise_speed_mph":71,"data_date":"2026-09-25","documents":[],"eng_mfr_mdl":"67017","engine_horsepower":800,"engine_maker":"WRIGHT","engine_model":"C7BA SERIES","engine_thrust_lb":0,"expiration_date":"2028-09-30","fractional_owner":0,"is_company":1,"is_electric":0,"is_unmanned_cert":0,"kit_mfr":"","kit_model":"","last_action_date":"2023-06-10","maker":"Sikorsky","maker_country":null,"maker_raw":"SIKORSKY","maker_segment":null,"mfr_mdl_code":"8141604","mode_s_code":"50657660","mode_s_hex":"A35FB0","model":"S-55B","n_number":"N31611","name":"SIERRA AERONAUTICS LLC","num_engines":1,"other_names":"","plain_english":"N31611 is a Sikorsky S-55B, a rotorcraft with turboshaft engines (a helicopter or multicopter), built in 1956. It has 12 seats. It is registered to Sierra Aeronautics LLC, an LLC in Franklin, Kentucky. The registration is valid: it was issued on September 21, 2021 and expires on September 30, 2028. It holds a restricted airworthiness certificate for agriculture and pest control; forest; other; aerial surveying; patrolling; aerial advertising, dated June 7, 1973.","region":"Central","region_code":"3","registrant_type":"LLC","registrant_type_code":"7","seats":12,"serial_number":"56-4255","source":"FAA Civil Aviation Registry, Releasable Aircraft Database","state":"KY","status":"Valid registration","status_code":"V","status_short":"Valid","street":"40 SULPHUR SPRING CHURCH RD","street2":"","type_aircraft":"Rotorcraft","type_aircraft_code":"6","type_engine":"Turboshaft","type_engine_code":"3","unique_id":"00061613","url":"https://staging.data.eflight.com/aircraft/N31611","watchlist_group":null,"watchlist_note":null,"weight_class":"","year_mfr":1956,"zip":"421348569"}