The Department of Homeland Security, specifically the U.S. Coast Guard, is seeking information on potential engine retrofit options for its HC-144B aircraft through a Sources Sought Notice. The objective is to identify viable Non-Developmental Item (NDI) aircraft engine systems that can enhance reliability, maintainability, and lifecycle costs while complying with Federal Aviation Regulations. The HC-144B aircraft, which supports critical missions such as Search and Rescue and surveillance, operates in challenging maritime environments, necessitating robust and efficient propulsion solutions. Interested parties must submit their responses by January 14, 2026, to the designated contacts, LCDR Mark Amendolara and Logan J. Brown, via email, ensuring to include the Notice ID in the subject line.