{"abstract":"We propose to supersede Airworthiness Directive (AD) 81-09-09, which applies to certain Meggitt (Troy), Inc. (previously known as Stewart Warner South Wind Corporation and as Stewart Warner South Wind Division) Model Series 8240 (Models 8240-A, 8240-C, 8240E, and 8248), 8253 (Models 8253-A, 8253-B, and 8253-C), 8259 (Models 8259-A, 8259-C, 8259-DL, 8259HL2, 8259HR2, 8259JR2, 8259L, and 8259M), and 8472 (Models 8472C and 8472D) combustion heaters. AD 81-09-09 currently requires repetitive inspections of the combustion heater; repetitive general inspections of the combustion heater installation; and, for combustion heaters having 1,000 hours or more time-in-service (TIS), overhaul of the combustion heater. Since we issued AD 81-09-09, there was an airplane accident, and we received reports of the heater malfunction. This proposed AD would retain most actions from AD 81-09-09, add a calendar time to the repetitive inspections, and add more detailed actions for the general inspection. We are proposing this AD to correct the unsafe condition on these products.","action":"Notice of proposed rulemaking (NPRM).","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/2014/08/20/2014-19729.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"79 FR 49249","comment_url":null,"comments_close_on":"2014-10-06","correction_of":null,"corrections":[],"dates":"We must receive comments on this proposed AD by October 6, 2014.","disposition_notes":null,"docket_ids":["Docket No. FAA-2014-0603","Directorate Identifier 2013-CE-026-AD"],"dockets":[],"document_number":"2014-19729","effective_on":null,"end_page":49252,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2014/08/20/2014-19729.xml","html_url":"https://www.federalregister.gov/documents/2014/08/20/2014-19729/airworthiness-directives-meggitt-troy-inc-combustion-heaters","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2014-19729?publication_date=2014-08-20","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2014-08-20/2014-19729/mods.xml","not_received_for_publication":null,"page_length":4,"page_views":{"count":2255,"last_updated":"2026-08-24 06:15:07 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2014-08-20/pdf/2014-19729.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2014-19729.pdf?1408452536","publication_date":"2014-08-20","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2014/08/20/2014-19729.txt","regulation_id_number_info":{"2120-AA64":{"issue":"202410","html_url":"https://www.federalregister.gov/regulations/2120-AA64/airworthiness-directives","title":"Airworthiness Directives","xml_url":"http://www.reginfo.gov/public/do/eAgendaViewRule?pubId=202410&RIN=2120-AA64&operation=OPERATION_EXPORT_XML","priority_category":"Routine and Frequent"}},"regulation_id_numbers":["2120-AA64"],"regulations_dot_gov_info":{"supporting_documents":[{"title":"U.S. DOT/FAA - Supporting AD Documents","document_id":"FAA-2014-0603-0021"},{"title":"Initial Regulatory Flexibility Analysis (IRFA)","document_id":"FAA-2014-0603-0015"},{"title":"2013-CE-026-AD Revised Regulatory Evaluation","document_id":"FAA-2014-0603-0014"},{"title":"U.S. DOT/FAA - Various Supplemental AD Documents","document_id":"FAA-2014-0603-0006"}],"comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=FAA-2014-0603","supporting_documents_count":4,"docket_id":"FAA-2014-0603","regulation_id_number":null,"title":"2013-CE-026-AD","checked_regulationsdotgov_at":"2014-10-07T05:01:16Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":49249,"subtype":null,"title":"Airworthiness Directives; Meggitt (Troy), Inc. Combustion Heaters","toc_doc":"Meggitt (Troy), Inc. Combustion Heaters","toc_subject":"Airworthiness Directives:","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Proposed Rule","volume":79}