{"airworthiness_class":"Standard","airworthiness_date":"1955-12-19","airworthiness_ops":"","category":"conventional","cert_issue_date":"2022-12-26","city":"EAST HELENA","country_code":"US","county_code":"049","cruise_speed_mph":90,"data_date":"2026-10-02","documents":[{"collateral_type":"Aircraft","doc_type":"Bill of sale (evidence of ownership)","doc_type_code":"BOS","party":"","receipt_date":"2026-09-09"}],"eng_mfr_mdl":"17005","engine_horsepower":75,"engine_maker":"CONT MOTOR","engine_model":"A&C75 SERIES","engine_thrust_lb":0,"expiration_date":"2029-12-31","fractional_owner":0,"is_company":1,"is_electric":0,"is_unmanned_cert":0,"kind":"piston-singles","kit_mfr":"","kit_model":"","last_action_date":"2023-09-22","maker":"Engineering & Research","maker_country":null,"maker_raw":"ENGINEERING & RESEARCH","maker_segment":null,"mfr_mdl_code":"0420314","mode_s_code":"51110611","mode_s_hex":"A49189","model":"ERCOUPE 415-CD","n_number":"N3939H","name":"COUPE NH LLC","ntsb_checked":true,"ntsb_records":[],"num_engines":1,"other_names":"","plain_english":"N3939H is an Engineering & Research ERCOUPE 415-CD, a fixed-wing airplane with one motor with a piston engine, built in 1947. It has 2 seats. It is registered to Coupe Nh LLC, an LLC in East Helena, Montana. The registration is valid: it was issued on December 26, 2022 and expires on December 31, 2029. It holds a standard airworthiness certificate, dated December 19, 1955. 1 document is on file: bill of sale (evidence of ownership).","records_check":[{"finding":"Valid registration to Coupe Nh LLC, an LLC, certificate issued December 26, 2022, expires December 31, 2029. No fractional interest recorded.","item":"Registration and identity","source":1,"status":"CLEAR"},{"finding":"The airworthiness certificate on file is dated December 19, 1955, 8 years after the 1947 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 4640 for this model in the deregistered file.","item":"Prior registrations of this airframe","source":2,"status":"CLEAR"},{"finding":"No other airframe has carried N3939H according to the deregistered file.","item":"Tail number reuse","source":2,"status":"CLEAR"},{"finding":"1 document received recently: Bill of sale (evidence of ownership) (September 9, 2026).","item":"Recent registry documents","source":3,"status":"NOTE"},{"finding":"No NTSB investigation records located under N3939H. 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":"Northwest Mountain","region_code":"S","registrant_type":"LLC","registrant_type_code":"7","seats":2,"serial_number":"4640","source":"FAA Civil Aviation Registry, Releasable Aircraft Database","state":"MT","status":"Valid registration","status_code":"V","status_short":"Valid","street":"PO BOX 1165","street2":"","type_aircraft":"Fixed-wing, single engine","type_aircraft_code":"4","type_engine":"Piston (reciprocating)","type_engine_code":"1","unique_id":"00070694","url":"https://eflight.com/aircraft/N3939H","watchlist_group":null,"watchlist_note":null,"weight_class":"","year_mfr":1947,"zip":"596351165"}