Rolls-Royce Corp., Indianapolis, Indiana, is awarded a $52,507,515 firm-fixed-price modification (P00010) to a previously awarded indefinite-delivery requirements contract (N6134019D0004). This modification establishes an option to extend services and adds flight hours for intermediate and depot level maintenance, logistics and engineering support for approximately 210 in-service T-45 F405-RR-401 Adour engines. Work will be performed in Meridian, Mississippi (47%); Kingsville, Texas (46%); Pensacola, Florida (6%); and Patuxent River, Maryland (1%), and is expected to be completed in June 2022. No funds are being obligated at time of award; funds will be obligated on individual orders as they are issued. The Naval Air Systems Command, Patuxent River, Maryland, is the contracting activity.