This document outlines a sole source federal contract opportunity for the overhaul of various cowling components for the F108 engine used in KC-135 aircraft. The Air Force Materiel Command Lifecycle Management Center at Tinker Air Force Base is seeking the overhaul of left hand fan cowling, right hand fan cowling, inlet nose cowling, and left and right hand fan duct assemblies from Boeing under solicitation number FA8119-17-R-0011. Responses are due May 1, 2017. Delivery is required in installments, with the first cowling components due every 75 days after receipt of order. The opportunity also includes repair management, data, and other logistical items. The total estimated quantities required are provided for multiple federal supply classes.