Key Points and Summary – The US Air Force’s B-52J modernization program is facing serious delays, primarily due to problems with its new radar system, according to a recent Government Accountability Office (GAO) report.
-The program’s Initial Operational Capability (IOC) is now projected for 2030 or later, a significant slip from previous timelines.
-The GAO identified high risks in software development, a lack of modern digital engineering practices like “digital twins” due to the radar’s 20-year-old hardware design, and a plan to enter low-rate production before flight testing is complete.
-These delays could create a capability gap for the USAF’s bomber fleet.
The B-52J Bomber Challenge
United States Air Force (USAF) planners have been counting on having a bomber force in the future that would include 75 of the modernized B-52Js. These aircraft would be in addition to a fleet of 145 B-21 Raiders.
Sources indicate that the Force considers 145 the required production run.
Unfortunately, the USAF will have to grapple with the dilemma that the upgraded B-52s will likely not be available within the service’s required timeframe. The latest GAO report, entitled “Weapon Systems Annual Assessment: DOD Leaders Should Ensure That Newer Programs Are Structured For Speed And Innovation,” now projects that none of these upgraded aircraft will be available until 2030 or later.
The delays of the B-52J achieving Initial Operational Capability (IOC) in no small measure due to problems with upgrading the aircraft’s radar.
The report’s introduction begins with the overall theme of “The Department of Defense (DOD) continues to struggle with delivering innovative technologies quickly and within budget.” The B-52J is not the only program to receive poor marks in this report.
The scope of the projects examined by the government watchdog were, with the B-52J being only one of them:
-79 major defense acquisition programs (MDAP)
-20 programs currently using the middle tier of acquisition (MTA) pathway
-seven future major weapon acquisitions
The B-52 Age Challenge
Other programs involve equally challenging technological bottlenecks that will delay their introduction into service.
However, the B-52 is probably the oldest program still in service, suffering numerous setbacks due to the age of the platform.
The fact that the aircraft are older than the parents of most of the crew members—in some cases even older than their grandparents—is one issue vexing those involved in the upgrade.
The B-52 first entered service in the 1950s, and the final, last version models were built in the 1960s.
The overall age of the platform has created numerous complications with the aircraft in particular and with the radar in general, which is designed and built by RTX.
“[The] B-52 RMP is not employing digital engineering leading practices such as creating a digital twin or using a digital thread, which can provide predictive knowledge about a system’s performance and allow for faster design iterations,” the GAO report observed.
However, another factor related to age enters the calculation. “Program officials explained that a digital twin or thread is difficult and costly to develop, mainly due to a 20-year-old radar hardware design.”
Validation to Production
The report also notes, “The program is also not validating integrated hardware and software in an operational environment prior to production. Officials stated that they are updating the program’s acquisition strategy so that the first low-rate production lot will be procured in the fourth quarter of fiscal year 2026 after the first low-rate production decision.”
An additional complication is that this production decision “will occur about 2 years before system-level flight testing or a system verification review is complete. The program office explained that the first low-rate production decision requires that a manufacturing readiness assessment be conducted and hardware maturity be demonstrated. However, these demonstrations will be limited to ground testing and a small amount of flight testing.”
Program officials that the GAO spoke to stated the software development and integration processes as “high risk.” This assessment is due to the need for mature software before flight testing is initiated. According to the program office, these delays in software development are due to a lack of integration lab hardware and a “higher-than-expected number of defects.” Completion of some risk mitigation steps has been delayed and will consequently also be 3 months late.
The program’s decision to begin production in the fourth quarter of fiscal year 2026 is another phase of the project at risk “due to software challenges.” The report also notes that officials stated that the milestone decision authority “will assess the risk in software to determine if it is sufficiently mitigated before approving the first low-rate production decision.”
Perhaps as an example of a project implementing some “lessons learned,” the program office stated that given the “perturbations in the B-52 RMP program schedule, the program is considering new development approaches to strike an effective balance between cost, risk, and timely delivery of capability to the warfighter.”
About the Author:
Reuben F. Johnson is a survivor of the February 2022 Russian invasion of Ukraine and is an Expert on Foreign Military Affairs and Director of the Asian Research Centre with the Fundacja im. Kazimierza Pułaskiego in Warsaw. He has been a consultant to the Pentagon, several NATO governments, and the Australian government in the fields of defense technology and weapon systems design. Over the past 30 years he has resided in and reported from Russia, Ukraine, Poland, Brazil, the People’s Republic of China and Australia.
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