{"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":"2026-10-02","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,"kind":"helicopters","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","ntsb_checked":true,"ntsb_records":[],"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.","records_check":[{"finding":"Valid registration to Sierra Aeronautics LLC, an LLC, certificate issued September 21, 2021, expires September 30, 2028. No fractional interest recorded.","item":"Registration and identity","source":1,"status":"CLEAR"},{"finding":"The airworthiness certificate on file is dated June 7, 1973, 17 years after the 1956 manufacture year. A re-issued certificate commonly follows export and re-import, a rebuild, or a return to the register after cancellation. The cause is documented in the FAA aircraft records file, which the full report obtains.","item":"Airworthiness certificate date","source":1,"status":"ATTENTION"},{"finding":"No earlier tail number is recorded against serial 56-4255 for this model in the deregistered file.","item":"Prior registrations of this airframe","source":2,"status":"CLEAR"},{"finding":"No other airframe has carried N31611 according to the deregistered file.","item":"Tail number reuse","source":2,"status":"CLEAR"},{"finding":"No bills of sale, loans or releases have reached the registry in recent weeks. The index covers only recent filings; older liens are in the records file.","item":"Recent registry documents","source":3,"status":"NOTE"},{"finding":"No NTSB investigation records located under N31611. CLEAR means the query ran and returned nothing, not that nothing ever happened.","item":"Accident and incident record","source":4,"status":"CLEAR"},{"finding":"These live in the FAA aircraft records file (every document ever filed against the aircraft) and, for larger aircraft, the International Registry. Part of the full report.","item":"Title chain, liens and 337 forms","source":null,"status":"PENDING"},{"finding":"AD compliance against the logbooks and flight-activity reconciliation are researched layers of the full report.","item":"Airworthiness directives and utilization","source":null,"status":"PENDING"}],"records_check_sources":[{"n":1,"name":"FAA Releasable Aircraft Database, master file","url":"https://registry.faa.gov/"},{"n":2,"name":"FAA deregistered aircraft file (part of the same download)","url":"https://registry.faa.gov/"},{"n":3,"name":"FAA document index: registry documents received in recent weeks","url":"https://registry.faa.gov/"},{"n":4,"name":"NTSB aviation accident database (CAROL)","url":"https://data.ntsb.gov/carol-main-public/basic-search"}],"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://eflight.com/aircraft/N31611","watchlist_group":null,"watchlist_note":null,"weight_class":"","year_mfr":1956,"zip":"421348569"}