This document outlines a sole source federal contract opportunity for aircraft engine cowling overhaul and repair services. The Air Force Materiel Command Lifecycle Management Center at Tinker Air Force Base is seeking to acquire left hand fan cowling, right hand fan cowling, inlet nose cowling, left hand fan duct and acoustic panel, and right hand fan duct and acoustic panel overhaul services for the KC-135 aircraft's F108 engine from The Boeing Corporation. Responses are due May 1, 2017. Delivery of overhauled cowlings is required every 75 days with quantities specified for each item. Services include repair management, supply of replacement parts, and engineering data. The point of contact for the solicitation is provided.