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 - SPE4A625R0147." This procurement aims to support a DLA Strategic Initiative involving ten National Stock Numbers (NSNs) associated with specific weapon systems, with Collins Aerospace identified as the sole source supplier for these items. The items are critical for maintaining operational readiness of the associated platforms, and the government intends to award the contract as an add-on to the existing Long-Term Contract (LTC): SPE4AX22D9404. Interested non-OEM suppliers must submit their expressions of interest and relevant documentation by January 28, 2019, to the contracting officer, Paul H Clark, at paul.h.clark@dla.mil, with the anticipated closing date for the procurement set for February 28, 2025.