This is a procurement for 167 spare alternating current generators for the B-52 aircraft, with delivery of one unit per month required between May 2027 and March 2041. The work is set aside for qualified sources, specifically Hamilton Sundstrand Corporation, indicating a limited source justification. The solicitation will be conducted electronically via www.fbo.gov, and the government's obligation is contingent upon the availability of funds. An ombudsman is appointed to address contractor concerns confidentially during the proposal phase.