Lone Star Aerospace Inc.,* Addison, Texas, was awarded a $7,799,797 cost-plus-fixed-fee modification (P00013) to a previously awarded indefinite-delivery, indefinite-quantity contract (N0042116D0012). This modification increases the ceiling to continue to address T-45 engine availability shortages that are adversely affecting the ability to train student naval aviators by utilizing existing modeling tools and subject matter experts, enabling the identification of focused improvements in depot-level engine maintenance procedures, including suboptimal production system flow, lack of trained manpower, high personnel turnover, coordination, communication, and prioritization of tasks. Work will be performed in Addison, Texas (99%); and Patuxent River, Maryland (1%), and is expected to be completed in October 2021. No funds will be obligated at time of award; funds will be obligated on individual orders as they are issued. The Naval Air Warfare Center Aircraft Division, Patuxent River, Maryland, is the contracting activity. (Awarded May 17, 2021)