Document 4bZEN0q479K9B2xzq227qD9N

What is FAA's rationale for resuming the use of the ILS-Y approach at DTW despite longstanding safety concerns and the discontinuation of weather-related mitigations previously deemed essential? What steps is FAA taking to address the known signal interference caused by the offset localizer antenna's placement, particularly during inclement weather or when smaller aircraft taxi through the critical area? What alternative configurations or modern systems, such as GPS approaches or relocating the offset localizer, are being actively evaluated and why have these alternatives not been prioritized? How does the FAA justify the current approach given the OSC's conclusion that the agency's findings on this matter lack adequate documentation? What independent, third-party review will be undertaken immediately to assess the safety of the ILS-Y approach and determine whether it should be allowed to continue? DTW has a strong track record as one of the nation's top-performing airports, consistently recognized with awards for its operations under a strong airport authority. As a critical hub for Michigan, the Midwest, and our national aviation network, DTW plays an essential role in keeping passengers and commerce moving safely and efficiently. That is why it is so important that flaws in FAA procedures and gaps in federal oversight are addressed quickly, so that the dedicated men and women working on the frontlines at DTW and the millions of travelers who rely on a safe, resilient air traffic control system are not put at risk. I urge you to suspend use of the ILS-Y approach at DTW until these issues are fully addressed, and to provide a comprehensive update on the steps FAA will take to ensure that this system operates with the highest safety standards. Thank you for your attention to this urgent matter. I am committed to working with you to ensure that our national aviation system is safe and modern. Sincerely, Debbie Dingell Member of Congress s2C) OST-2025-1200 Page 00184 Sierra Club v. Dept. of Transp. - 3:25-cv-06221 SC_EVERSPLIT0011865 From: Sent: To: Subject: American Road Trip LaRotonda, Nick (OST) Fri, 28 Mar 2025 16:25:40 +0000 Carter, Jessica (J.) Accepted: Nick LaRotonda (DoT)/Jessica Carter (Ford) Connect on Great OST-2025-1200 Page 00185 Sierra Club v. Dept. of Transp. - 3:25-cv-06221 SC_EVERSPLIT0011866 From: Sent: To: Subject: American Road Trip LaRotonda, Nick (OST) Mon, 31Mar 2025 16:50:40 +0000 Carter, Jessica (J.) Accepted: Nick LaRotonda (DoT)/Jessica Carter (Ford) Connect on Great OST-2025-1200 Page 00186 Sierra Club v. Dept. of Transp. - 3:25-cv-06221 SC_EVERSPLIT0011867 From: Sent: To: Subject: LaRotonda, Nick (OST) Tue, 6 May 2025 15:01:37 +0000 Allison O'Brien Accepted: 11:30am CT: May 20th Sync OST-2025-1200 Page 00187 Sierra Club v. Dept. of Transp. - 3:25-cv-06221 SC_EVERSPLIT0011868