{"abstract":"We are superseding an existing airworthiness directive (AD) for certain Cessna Aircraft Company (Cessna) Models 172R and 172S airplanes. That AD currently requires you to inspect the fuel return line assembly for chafing; replace the fuel return line assembly if chafing is found; and inspect the clearance between the fuel return line assembly and both the right steering tube assembly and the airplane structure, adjusting as necessary. Since we issued that AD, we have received a field report of a fuel return line chafing incident on a Cessna Model 172 airplane with a serial number (S/N) that was not included in the AD. This AD retains the actions of the current AD and adds S/Ns to the Applicability section of the AD. Chafing of the fuel return line assembly could lead to fire. This new AD requires the actions of the current AD and adds S/Ns to the Applicability section of the AD. We are issuing this AD to correct the unsafe condition on these products.","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/2012/02/07/2012-1451.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"77 FR 6003","comment_url":"http://www.regulations.gov/commenton/FAA-2011-1245-0003","comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This AD is effective March 13, 2012.","disposition_notes":null,"docket_ids":["Docket No. FAA-2011-1245","Directorate Identifier 2011-CE-033-AD","Amendment 39-16925","AD 2012-02-02"],"dockets":[],"document_number":"2012-1451","effective_on":"2012-03-13","end_page":6005,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2012/02/07/2012-1451.xml","html_url":"https://www.federalregister.gov/documents/2012/02/07/2012-1451/airworthiness-directives-cessna-aircraft-company-airplanes","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2012-1451?publication_date=2012-02-07","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2012-02-07/2012-1451/mods.xml","not_received_for_publication":null,"page_length":3,"page_views":{"count":706,"last_updated":"2026-04-04 10:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2012-02-07/pdf/2012-1451.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2012-01451.pdf?1328536146","publication_date":"2012-02-07","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2012/02/07/2012-1451.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 - See Attachments","document_id":"FAA-2011-1245-0004"},{"title":"U.S. DOT/FAA  - See Attachments","document_id":"FAA-2011-1245-0002"}],"comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=FAA-2011-1245","supporting_documents_count":2,"docket_id":"FAA-2011-1245","regulation_id_number":null,"title":"2011-CE-033-AD","checked_regulationsdotgov_at":"2023-03-01T19:46:47Z"},"regulations_dot_gov_url":"http://www.regulations.gov/commenton/FAA-2011-1245-0003","significant":false,"signing_date":null,"start_page":6003,"subtype":null,"title":"Airworthiness Directives; Cessna Aircraft Company Airplanes","toc_doc":"Cessna Aircraft Company Airplanes","toc_subject":"Airworthiness Directives:","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Rule","volume":77}