Air Force Scales Back B-52 Radar Upgrade Program, Plans New Engine Testing

Why It Matters

The adjustments balance modernization needs with budget constraints, preserving the B‑52’s role in the nuclear triad and conventional strike missions while mitigating schedule risk.

Key Takeaways

• Radar upgrade trimmed to minimum viable product.
• Legacy radome retained while new radar tested.
• AN/APQ-188 radar low-rate production decision Q4 FY26.
• Engine re‑fit testing slated for FY27 after CDR FY26.
• 69% of fleet contracts planned before full engine validation.

Pulse Analysis

The Air Force’s decision to pare down the B‑52 radar upgrade reflects a broader trend in defense acquisition: prioritize essential capabilities while containing spiraling costs. By delivering a subset of the original radar suite and retaining the legacy radome, the service can field the AN/APQ‑188—an active electronically‑scanned array that replaces the aging analog system—without waiting for the complex radome redesign. This approach satisfies immediate operational needs, especially as the bomber’s mission‑capable rate hovers around 50 percent, and aligns with congressional cost‑notification requirements triggered by earlier budget overruns.

Concurrently, the Commercial Engine Replacement Program is moving forward despite a three‑year delay. Rolls‑Royce’s F130 engines cleared critical design review in December 2024, and a critical design review for the integration effort is scheduled for FY 2026, with two B‑52s slated for modification and flight testing in FY 2027. The program’s concurrency—testing engines while production ramps up—poses significant risk, as past programs have shown cost spikes when defects emerge late. To offset this, the Air Force plans to award contracts for roughly 69 % of the fleet before full operational testing, citing projected savings from larger procurement lots and alignment with depot‑maintenance cycles.

These program adjustments have strategic implications for the United States’ long‑range strike capability. Maintaining a modernized B‑52 fleet is critical to both the nuclear deterrent and conventional operations, such as the ongoing missions in the Middle East. By focusing on a viable radar package and advancing engine testing on a limited scale, the Air Force aims to keep the bomber serviceable through the 2050s while managing fiscal exposure. Successful execution will reinforce the B‑52’s relevance in a contested future battlespace, whereas further delays could strain readiness and force reliance on less capable legacy systems.