The Department of Defense, through the Defense Logistics Agency (DLA) Aviation, Richmond, is initiating a sole source procurement for 68 National Stock Numbers (NSNs) related to aircraft hydraulic, vacuum, and de-icing system components. This procurement aims to support various sole-sourced weapon systems and operational platforms, with Collins Aerospace identified as the approved source for these items. The items will be awarded as add-ons to the existing Long-Term Contract (LTC): SPE4AX22D9404, and interested non-OEM sources must submit their interest and capability documentation by January 28, 2019. For further inquiries, potential respondents can contact Paul H. Clark at Paul.H.Clark@dla.mil or by phone at 804-279-1654, with the anticipated closing date for this procurement set for February 28, 2025.