2023-07037

Document Headings Document headings vary by document type but may contain the following: • the agency or agencies that issued and signed a document • the number of the CFR title and the number of each part the document amends, proposes to amend, or is directly related to • the agency docket number / agency internal file number • the RIN which identifies each regulatory action listed in the Unified Agenda of Federal Regulatory and Deregulatory Actions See the Document Drafting Handbook for more details. Department of Transportation Federal Aviation Administration • 14 CFR Part 39 • [Docket No. FAA-2023-0433; Project Identifier AD-2022-00619-T; Amendment 39-22381; AD 2023-05-12] • RIN 2120-AA64 AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule; request for comments. SUMMARY: The FAA is adopting a new airworthiness directive (AD) for all The Boeing Company Model 767-2C series airplanes. This AD was prompted by arcing on an electrical terminal lug in a certain electrical power panel that caused heat and smoke damage, as a result of a loose power feeder terminal lug connection. This AD requires inspection of each terminal lug on certain electrical power panels for evidence of arcing and/or loose connection and applicable on-condition actions. The FAA is issuing this AD to address the unsafe condition on these products. DATES: This AD is effective April 20, 2023. The FAA must receive comments on this AD by May 22, 2023. ADDRESSES: You may send comments, using the procedures found in 14 CFR 11.43 and 11.45, by any of the following methods: • Federal eRulemaking Portal: Go to regulations.gov. Follow the instructions for submitting comments. • Fax: 202-493-2251. • Mail: U.S. Department of Transportation, Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue SE, Washington, DC 20590. • Hand Delivery: Deliver to Mail address above between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. AD Docket: You may examine the AD docket at regulations.gov by searching for and locating Docket No. FAA-2023-0433; or in person at Docket Operations between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this final rule, any comments received, and other information. The street address for Docket Operations is listed above. FOR FURTHER INFORMATION CONTACT: Hien T. Nguyen, Aerospace Engineer, Systems and Equipment Section, FAA, Seattle ACO Branch, 2200 South 216th St., Des Moines, WA 98198; phone: 405-954-5298; email: Hien.T.Nguyen@faa.gov. SUPPLEMENTARY INFORMATION: Background The FAA received a report of an arcing event on an electrical terminal lug in the P34 panel that caused heat and smoke damage within the panel. It was determined that the arcing was a result of a loose power feeder terminal lug connection. An investigation into the root cause determined that the terminal lug was not torqued to the required specifications resulting in a loose connection. The under-torqued terminal lug was determined to be a workmanship issue. Additional inspections to other electrical power panels resulted in multiple findings of under-torqued terminal lugs. Under-torqued terminal lugs, if not addressed, could result in arcing that may lead to loss of critical function and loss of continued safe flight and landing. The FAA is issuing this AD to address the unsafe condition on these products. FAA's Determination The FAA is issuing this AD because the agency has determine…

Fonte: Federal Register (federalregister.gov). Texto original em inglês. Conteúdo sanitizado por segurança.