This procurement is for the supply of T56 engine power section torque housing units, with a best estimated quantity of 8, a minimum of 7, and a maximum of 12. The requested delivery schedule is 416 days after receipt of order, with production units to be shipped to location SW3211. The Government intends to solicit and compete this contract with only a limited number of sources, identifying Rolls-Royce Corporation as the only currently known approved source. A letter request for proposal will be posted electronically, and contract award is contingent on meeting qualification requirements at the time of award. Interested parties may identify their capability to satisfy the requirement with a commercial item within 15 days of this notice.