{"airworthiness_class":"Standard","airworthiness_date":"1998-11-29","airworthiness_ops":"Transport","category":"conventional","cert_issue_date":"2018-11-15","city":"CHICAGO","country_code":"US","county_code":"031","cruise_speed_mph":null,"data_date":"2026-10-02","documents":[],"eng_mfr_mdl":"13802","engine_horsepower":2200,"engine_maker":"CFM INTL.","engine_model":"CFM56 SERIES","engine_thrust_lb":0,"expiration_date":"2028-11-30","fractional_owner":0,"is_company":1,"is_electric":0,"is_unmanned_cert":0,"kind":"airliners","kit_mfr":"","kit_model":"","last_action_date":"2023-06-23","maker":"Boeing","maker_country":null,"maker_raw":"BOEING","maker_segment":null,"mfr_mdl_code":"13844BZ","mode_s_code":"50056730","mode_s_hex":"A05DD8","model":"737-824","n_number":"N12221","name":"UNITED AIRLINES INC","ntsb_checked":true,"ntsb_records":[{"city":"Greenville","damage":"SUBS","date":"2011-05-06","highest_injury":"NONE","ntsb_no":"DCA11FA052","probable_cause":"The failure of a utility pipe beneath the ramp surface, which caused a localized void in the soil and resulting reduction in the load bearing capability of the ramp.","registration":"N12221","state":"MS","summary":"Accident on May 6, 2011 at Greenville, MS: no injuries, substantial damage.","type":"ACC"},{"city":"ATLANTIC OCEAN","damage":"MINR","date":"1999-07-08","highest_injury":"SERS","ntsb_no":"IAD99FA052","probable_cause":"the aircrew's inadvertent encounter with unforecast clear air turbulence.","registration":"N12221","state":"AO","summary":"Accident on July 8, 1999 at Atlantic Ocean, AO: serious injuries, minor damage.","type":"ACC"}],"num_engines":2,"other_names":"","plain_english":"N12221 is a Boeing 737-824, a fixed-wing airplane with more than one motor with turbofan engines, built in 1998. It has 149 seats. It is registered to United Airlines INC, a corporation in Chicago, Illinois. The registration is valid: it was issued on November 15, 2018 and expires on November 30, 2028. It holds a standard airworthiness certificate for transport, dated November 29, 1998.","records_check":[{"finding":"Valid registration to United Airlines INC, a corporation, certificate issued November 15, 2018, expires November 30, 2028. No fractional interest recorded.","item":"Registration and identity","source":1,"status":"CLEAR"},{"finding":"Standard certificate for transport, dated November 29, 1998, consistent with the 1998 manufacture year.","item":"Airworthiness certificate","source":1,"status":"CLEAR"},{"finding":"No earlier tail number is recorded against serial 28930 for this model in the deregistered file.","item":"Prior registrations of this airframe","source":2,"status":"CLEAR"},{"finding":"N12221 was previously assigned to 2 other aircraft: Handley Page HP-137 MK1 (serial 221, cancelled September 2, 1992); Lockheed 9A SPECIAL (serial 178, cancelled November 21, 1931). 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":"2 NTSB records under N12221: Accident on May 6, 2011 at Greenville, MS: no injuries, substantial damage. Accident on July 8, 1999 at Atlantic Ocean, AO: serious injuries, minor damage. 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":"Great Lakes","region_code":"C","registrant_type":"Corporation","registrant_type_code":"3","seats":149,"serial_number":"28930","source":"FAA Civil Aviation Registry, Releasable Aircraft Database","state":"IL","status":"Valid registration","status_code":"V","status_short":"Valid","street":"233 S WACKER DR","street2":"","type_aircraft":"Fixed-wing, multi-engine","type_aircraft_code":"5","type_engine":"Turbofan","type_engine_code":"5","unique_id":"00963666","url":"https://eflight.com/aircraft/N12221","watchlist_group":null,"watchlist_note":null,"weight_class":"","year_mfr":1998,"zip":"606067147"}