{"abstract":"This amendment supersedes an existing airworthiness directive (AD), applicable to certain Lockheed Model 382 series airplanes, that currently requires a revision to the Airplane Flight Manual to require takeoff operation in accordance with revised performance data. That AD also requires installation of certain valve housings for the propeller governor on the outboard engines. This amendment revises the applicability of the existing AD to remove certain airplanes. This amendment also revises references to a certain replacement part number of a valve housing. The actions specified by this AD are intended to ensure that the airplane maintains adequate thrust decay characteristics in the event of critical engine failure during takeoff.","action":"Final rule.","agencies":[{"raw_name":"DEPARTMENT OF TRANSPORTATION","name":"Transportation Department","id":492,"url":"https://www.federalregister.gov/agencies/transportation-department","json_url":"https://www.federalregister.gov/api/v1/agencies/492","parent_id":null,"slug":"transportation-department"},{"raw_name":"Federal Aviation Administration","name":"Federal Aviation Administration","id":159,"url":"https://www.federalregister.gov/agencies/federal-aviation-administration","json_url":"https://www.federalregister.gov/api/v1/agencies/159","parent_id":492,"slug":"federal-aviation-administration"}],"body_html_url":"https://www.federalregister.gov/documents/full_text/html/1997/02/28/97-4946.html","cfr_references":[{"chapter":null,"citation_url":null,"part":"39","title":14}],"citation":"62 FR 9075","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"Effective April 4, 1997.","disposition_notes":null,"docket_ids":["Docket No. 96-NM-35-AD","Amendment 39-9951","AD 97-05-07"],"dockets":[],"document_number":"97-4946","effective_on":"1997-04-04","end_page":9076,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":null,"html_url":"https://www.federalregister.gov/documents/1997/02/28/97-4946/airworthiness-directives-lockheed-model-382-series-airplanes","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/97-4946?publication_date=1997-02-28","mods_url":"https://www.govinfo.gov/metadata/granule/FR-1997-02-28/97-4946/mods.xml","not_received_for_publication":null,"page_length":2,"page_views":{"count":29,"last_updated":"2026-10-23 12:15:06 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-1997-02-28/pdf/97-4946.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":null,"publication_date":"1997-02-28","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/1997/02/28/97-4946.txt","regulation_id_number_info":{"2120-AA64":{"issue":"202504","html_url":"https://www.federalregister.gov/regulations/2120-AA64/airworthiness-directives","title":"Airworthiness Directives","xml_url":"http://www.reginfo.gov/public/do/eAgendaViewRule?pubId=202504&RIN=2120-AA64&operation=OPERATION_EXPORT_XML","priority_category":"Routine and Frequent"}},"regulation_id_numbers":["2120-AA64"],"regulations_dot_gov_info":{"checked_regulationsdotgov_at":"2011-09-21T00:54:39Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":9075,"subtype":null,"title":"Airworthiness Directives; Lockheed Model 382 Series Airplanes","toc_doc":null,"toc_subject":null,"topics":[],"type":"Rule","volume":62}