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The U.S. Air Force advanced two cornerstone upgrades for its B-52 fleet in 2026, greenlighting full development of a new engine package on June 1 and authorizing initial production of a modern radar on Aug. 21. Service officials say the moves keep the Cold War-era bomber on track to remain a central element of U.S. nuclear and long-range strike forces into the 2050s and beyond.
“These back-to-back milestones reflect the maturity of both programs and the strong partnership between the B-52 Program Office, Boeing, Rolls-Royce and Raytheon,” said Brig. Gen. Timothy Spaulding, portfolio acquisition executive for Bombers and Director of the Air Force Life Cycle Management Center’s Bombers Directorate. “These programs are delivering the propulsion reliability, sensor capability and electrical power needed to keep this legendary bomber viable, lethal, and supportable well into the future.”
Under the Commercial Engine Replacement Program, the Air Force plans to swap out the bomber’s legacy TF33 engines for Rolls-Royce F130s and refresh critical subsystems such as hydraulic pumps, cockpit displays, flight controls and generators to boost onboard power. With Milestone B approval, the effort formally entered engineering and manufacturing development with an initial program baseline of $20.2 billion across research, development, test and evaluation, procurement and military construction. Of that total, $2.6 billion has been obligated since 2018. Program officials said the cost and schedule were set using a data-driven assessment that accounts for integrating new equipment onto a 70-year-old airframe.
Technical risk reduction has included early wind-tunnel work that uncovered inlet airflow distortion; engineers redesigned the nacelle and inlet, verified the fix through testing, and completed a critical design review with Boeing and Rolls-Royce in May 2026. Engine testing is ongoing. Two aircraft that recently returned from depot maintenance and are currently flying operational missions are slated to head to Boeing’s San Antonio facility in the months ahead to receive both the new engines and the upgraded radar at the same time.
“CERP is a critical investment in the enduring credibility and capability of the B-52 force,” said William Bailey, performing the duties of the assistant secretary of the Air Force for Acquisition, Technology and Logistics. “By establishing a stable cost and schedule foundation, we are positioning the B-52 to provide reliable, long-range strike and deterrence capacity for decades to come.”
On the navigation and sensing front, the Radar Modernization Program is replacing the B-52’s 1980s-vintage APQ-166 analog set with the APQ-188, a military off-the-shelf active electronically scanned array related to systems used on the F-15 and F/A-18. The Milestone C decision cleared the program to begin low-rate initial production, and contracts were awarded the same day to Raytheon Technologies for radar units and to Boeing for installation kits. Production starts with Lot 1 of four kits and proceeds through five lots totaling 74 kits, a plan the Air Force says balances stability and affordability. Hardware maturity and integration risks were addressed through ground testing of the initial software build, and a June 2026 production readiness review found the system prepared for initial manufacturing.
Beyond propulsion and radar, the enterprise continues to add survivable nuclear command-and-control communications, including Extremely High Frequency terminals, as well as conventional beyond-line-of-sight connectivity such as Hybrid SATCOM. Weapons work includes integrating the latest variants of the Long-Range Anti-Ship Missile and the Joint Air-to-Surface Standoff Missile, while the bomber remains a testbed for hypersonic systems.
Service engineers also completed detailed structural analyses tied to the engine milestone to validate the airframe’s ability to handle new powerplants, higher electrical loads and decades of additional flying. Those assessments concluded the B-52 design retains substantial structural life, with fatigue margins projected to support operations well past midcentury.
Air Force officials frame the modernization push around four pillars—aviate, navigate, communicate and eliminate—underscoring a broad effort to update how the B-52 flies, senses, connects and delivers weapons, in close partnership with Boeing, Rolls-Royce and Raytheon.
