The Defense Logistics Agency (DLA) Aviation is planning to issue a Letter Request for Proposal (RFP) to add twenty-one (21) National Stock Numbers (NSNs) to an existing long-term contract with Moog, Inc. This procurement is a sole-source requirement, aimed at maintaining the supply of critical aircraft hydraulic, vacuum, and de-icing system components, which are essential for operational readiness within the Department of Defense. Interested non-original equipment manufacturers (OEMs) and surplus dealers are encouraged to respond with their capabilities and pricing, as the government may adjust its acquisition strategy based on the responses received. For further inquiries, interested parties can contact Valerie Skeen at valerie.skeen@dla.mil or by phone at 804-279-6834, with responses due prior to the synopsis closing date.