{"airworthiness_class":"","airworthiness_date":"","airworthiness_ops":"","category":"drone","cert_issue_date":"2025-05-02","city":"LENOX","country_code":"US","county_code":"173","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":"2032-05-31","fractional_owner":0,"is_company":0,"is_electric":1,"is_unmanned_cert":0,"kind":"drones","kit_mfr":"","kit_model":"","last_action_date":"2025-05-02","maker":"Hylio","maker_country":"US","maker_raw":"HYLIO INC","maker_segment":"Agricultural drones","mfr_mdl_code":"06102EY","mode_s_code":"50054413","mode_s_hex":"A0590B","model":"AG 230","n_number":"N121ST","name":"TROST SCOT A","ntsb_checked":true,"ntsb_records":[{"city":"SCOTTSDALE","damage":"DEST","date":"1991-10-27","highest_injury":"FATL","ntsb_no":"LAX92LA026","probable_cause":"THE CERTIFIED FLIGHT INSTRUCTORS DECISION TO FLY INTO KNOWN FORECAST WEATHER CONDITIONS SPECIFICALLY PROHIBITED BY THE AIRPLANE'S OWNER'S MANUAL AND DECISION TO ALLOW AN UNQUALIFIED PILOT WITH LIMITED INSTRUMENT FLIGHT EXPERIENCE TO OCCUPY THE LEFT SEAT BEHIND THE FLIGHT INSTRUMENTS WHICH SUBSEQUENTLY RESULTED IN A INFLIGHT LOSS OF CONTROL. CONTRIBUTING TO THE ACCIDENT WAS THE CERTIFIED FLIGHT INSTRUCTOR'S INADEQUATE SUPERVISION OF THE UNQUALIFIED PILOT.","registration":"N121ST","state":"AZ","summary":"Accident on October 27, 1991 at Scottsdale, AZ: fatal, destroyed (2 fatal).","type":"ACC"}],"num_engines":8,"other_names":"","plain_english":"N121ST is a Hylio AG 230, a rotorcraft powered by electric motors (a helicopter or multicopter). It is unmanned. It is registered to an individual in Lenox, Iowa. The registration is valid: it was issued on May 2, 2025 and expires on May 31, 2032. No airworthiness certificate is on file, which is normal for drones and for aircraft still being built or tested.","records_check":[{"finding":"Valid registration to Trost Scot A, an individual, certificate issued May 2, 2025, expires May 31, 2032. No fractional interest recorded.","item":"Registration and identity","source":1,"status":"CLEAR"},{"finding":"No airworthiness certificate is on file. Usual for a newly registered aircraft, a project, or an aircraft that has not flown since a change of registration; ask for the certificate.","item":"Airworthiness certificate","source":1,"status":"ATTENTION"},{"finding":"No earlier tail number is recorded against serial 17906100252 for this model in the deregistered file.","item":"Prior registrations of this airframe","source":2,"status":"CLEAR"},{"finding":"N121ST was previously assigned to 2 other aircraft: Poellien Gary R ADVCD AVIA BUCCNR SX (serial BUC.SX.0027, cancelled May 13, 2015); Hacker Stephen W GLASAIR III (serial 3157, cancelled February 27, 1992). Histories keyed to the tail number alone can mix aircraft up; this check keys on the serial number.","item":"Tail number reuse","source":2,"status":"ATTENTION"},{"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":"1 NTSB record under N121ST: Accident on October 27, 1991 at Scottsdale, AZ: fatal, destroyed (2 fatal). Details below.","item":"Accident and incident record","source":4,"status":"ATTENTION"},{"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":"Individual","registrant_type_code":"1","seats":0,"serial_number":"17906100252","source":"FAA Civil Aviation Registry, Releasable Aircraft Database","state":"IA","status":"Valid registration","status_code":"V","status_short":"Valid","street":"1148 STATE HIGHWAY 25","street2":"","type_aircraft":"Rotorcraft","type_aircraft_code":"6","type_engine":"Electric","type_engine_code":"10","unique_id":"01483593","url":"https://eflight.com/aircraft/N121ST","watchlist_group":null,"watchlist_note":null,"weight_class":"","year_mfr":null,"zip":"508518807"}