Airworthiness Directives; The Boeing Company Airplanes

fice [ www.gpo.gov ] [FR Doc No: 2026-13129] ----------------------------------------------------------------------- DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA-2026-4668; Project Identifier AD-2025-01680-T] RIN 2120-AA64 Airworthiness Directives; The Boeing Company Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). ----------------------------------------------------------------------- SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 747-400 series airplanes. This proposed AD was prompted by reports of potable water leaking into the electrical equipment bay cooling air inlet. This proposed AD would require performing repetitive inspections of potential water sources from the upper deck and the main deck, including potable water and waste water lines, for any water leaks and clogs, and applicable on- condition actions. The FAA is proposing this AD to address the unsafe condition on these products. DATES: The FAA must receive comments on this proposed AD by August 14, 2026. 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.