The US Department of War is actively seeking alternative propulsion solutions for the Boeing F-15EX and Lockheed Martin F-16 fighter aircraft. According to FlightGlobal, this request for information (RFI) aims to challenge the established engine duopoly that has supplied these two critical Air Force assets for decades, as the military pivots toward industry-led technological evolution and capacity expansion.

This shift in strategy is intended to address systemic challenges currently impacting the industrial base, including documented production delays, quality control concerns, and critical obsolescence across key engine components. The scope of this initiative encompasses propulsion requirements for both the US Air Force and international Foreign Military Sales (FMS) partners.

### Propulsion Requirements and Goals

The Department of War intends to scale its procurement significantly, targeting an annual output of 180 engines by FY2034. The primary objectives of this transition include improved affordability, enhanced sustainability, and more efficient logistics management to ensure a steady supply of spare parts. By optimizing maintenance requirements, the Department aims to increase overall aircraft availability and mission-capable rates.

| Feature | Detail | | :--- | :--- | | Primary Aircraft | Boeing F-15EX, Lockheed Martin F-16 | | Target Engine Volume | 180 engines annually | | Target Fiscal Year | FY2034 | | Historical Suppliers | Pratt & Whitney, GE Aerospace |

Historically, the F-15 and F-16 platforms have relied on the Pratt & Whitney F100 family. In the 1980s, the GE Aerospace F110 was introduced as a competitive alternative, and it remains in use today, including on the newer F-15EX model. The current effort seeks to modernize this supply chain, ensuring that maintenance man-hours are reduced while reliability is maximized to meet evolving global threats.

## Why It Matters

The move to diversify engine sourcing for the F-15EX and F-16 signals a major shift in how the Department of War manages its long-term tactical aviation readiness. By moving away from a traditional two-firm supplier structure, the government is attempting to de-risk the supply chain against the vulnerabilities inherent in sole-source or limited-source dependency. If successful, this strategy could force prime engine manufacturers to accelerate innovation cycles, potentially lowering lifecycle costs and creating a more resilient industrial base capable of meeting high-intensity operational demands throughout the 2030s.