{"airworthiness_class":"Experimental","airworthiness_date":"1980-10-01","airworthiness_ops":"Amateur built","category":"conventional","cert_issue_date":"2024-06-21","city":"MADISON","country_code":"US","county_code":"079","cruise_speed_mph":null,"data_date":"2026-10-02","documents":[],"eng_mfr_mdl":"","engine_horsepower":null,"engine_maker":"","engine_model":"","engine_thrust_lb":null,"expiration_date":"2031-06-30","fractional_owner":0,"is_company":0,"is_electric":0,"is_unmanned_cert":0,"kind":"piston-singles","kit_mfr":"","kit_model":"","last_action_date":"2024-06-21","maker":"Bolster","maker_country":null,"maker_raw":"BOLSTER","maker_segment":null,"mfr_mdl_code":"7220652","mode_s_code":"51174566","mode_s_hex":"A4F976","model":"PITTS SPECIAL S-1S","n_number":"N42BY","name":"KNUTH MATTHEW","ntsb_checked":true,"ntsb_records":[],"num_engines":1,"other_names":"","plain_english":"N42BY is a Bolster PITTS SPECIAL S-1S, a fixed-wing airplane with one motor with a piston engine. It has 1 seat. It is registered to an individual in Madison, South Dakota. The registration is valid: it was issued on June 21, 2024 and expires on June 30, 2031. It holds an experimental airworthiness certificate for amateur built, dated October 1, 1980.","records_check":[{"finding":"Valid registration to Knuth Matthew, an individual, certificate issued June 21, 2024, expires June 30, 2031. No fractional interest recorded.","item":"Registration and identity","source":1,"status":"CLEAR"},{"finding":"Experimental certificate for amateur built; the FAA file gives no certificate date and no manufacture year.","item":"Airworthiness certificate","source":1,"status":"NOTE"},{"finding":"No earlier tail number is recorded against serial 476B1077 for this model in the deregistered file.","item":"Prior registrations of this airframe","source":2,"status":"CLEAR"},{"finding":"No other airframe has carried N42BY 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 N42BY. 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":"Great Lakes","region_code":"C","registrant_type":"Individual","registrant_type_code":"1","seats":1,"serial_number":"476B1077","source":"FAA Civil Aviation Registry, Releasable Aircraft Database","state":"SD","status":"Valid registration","status_code":"V","status_short":"Valid","street":"6107 GRANDVIEW DR APT 14","street2":"","type_aircraft":"Fixed-wing, single engine","type_aircraft_code":"4","type_engine":"Piston (reciprocating)","type_engine_code":"1","unique_id":"00851644","url":"https://eflight.com/aircraft/N42BY","watchlist_group":null,"watchlist_note":null,"weight_class":"","year_mfr":null,"zip":"570427321"}