The U.S. Army Aviation and Missile Command is seeking a contractor to perform overhaul and upgrade of the Gearbox Accessory Drive, with an estimated quantity range of 70 to 250 units. This will result in a 5-year, Firm Fixed-Price Indefinite Delivery Indefinite Quantity contract, with performance at the contractor’s facility. The procurement is restricted to Sikorsky Aircraft Corporation as the only approved source; other firms must seek Systems Readiness Directorate approval to be considered. The solicitation is currently unfunded, and award will be withheld until sufficient funds are received. No budget amount or submission timeline is specified.