The Defense Logistics Agency (DLA) Aviation is initiating a sole source procurement for various aircraft hydraulic, vacuum, and de-icing system components under the solicitation title "Sole Source Procurement - SPE4A625R0131." This procurement aims to support a strategic initiative involving 40 National Stock Numbers (NSNs) associated with sole-sourced weapon systems and operational platforms, with Collins Aerospace identified as the approved source of supply. The items are critical for maintaining operational readiness and support for military aircraft, and the contract is anticipated to be awarded on a sole source basis, with a letter solicitation format being utilized. Interested non-OEM sources must submit their expressions of interest and relevant documentation by January 28, 2019, while the anticipated closing date for the procurement is February 28, 2025. For further inquiries, interested parties can contact Paul H. Clark at Paul.H.Clark@dla.mil or by phone at 804-279-1654.