The Boeing Co., St. Louis, Missouri, is awarded a $51,980,284 firm-fixed-price order (N0042121F0394) against a previously issued basic ordering agreement (N0001921G0006). This order procures Lots Three and Four T-45 aircraft inlet modification retrofit kits. Additionally, this order includes associated support equipment, special tooling, logistics support, and original equipment manufacturer engineering for the Navy. Work will be performed in St. Louis, Missouri, and is expected to be completed in January 2025. Fiscal 2021 aircraft procurement (Navy) funds in the amount of $28,339,555; and fiscal 2020 aircraft procurement (Navy) funds in the amount of $23,640,729 will be obligated at time of award, none of which will expire at the end of the fiscal year. The Naval Air Warfare Center Aircraft Division, Patuxent River, Maryland, is the contracting activity.