Pratt & Whitney Wins $1.3B F135 Spare Parts Contract

Pratt & Whitney has secured a nearly $1.3 billion undefinitized contracts to supply F135 engine spare parts for the global F-35 Lightning II fleet during fiscal year 2026.

Announced in a July 31, 2026, press release by parent company RTX Corporation, the Indefinite Delivery, Indefinite Quantity (IDIQ) award funds initial spare parts, deployable spare packages, depot lay-ins, and associated support equipment across all three variants of the combat Military-Aircraft.

Global sustainment and fleet readiness

The F135 sustainment enterprise currently supports operations at 42 bases and 13 ships worldwide. With more than 1,500 production engines delivered to date, the propulsion system is operated by 20 allied nations.

“Ensuring the F135 remains mission-ready is critical to the success of the F-35 enterprise,” stated Chris Johnson, Vice President of Pratt & Whitney’s F135 Program. “This contract will help strengthen our global sustainment network to ensure operators around the world can continue to rely on the F135’s unmatched performance.”

Modernization and contracting context

Pratt & Whitney plans to leverage this established sustainment network to deploy the F135 Engine Core Upgrade (ECU). The ECU has been selected as the Propulsion modernization solution for the F-35, designed to enhance fleet readiness and provide long-term capability.

While the RTX announcement did not explicitly name the awarding agency, defense contracting for the F135 propulsion system is primarily managed by the U.S. Department of Defense (DoD) Naval Air Systems Command (NAVAIR), according to reporting by Dow Jones Newswires.

AirPro News analysis

We note that undefinitized contracts allow contractors to begin work before all terms and prices are finalized, a mechanism often utilized by the DoD to prevent delays in critical supply chains. Securing spare parts funding for fiscal year 2026 ensures that the expanding global footprint of the F-35 will not outpace the logistical support required to keep the aircraft operational. As the F135 Engine Core Upgrade transitions from development to deployment, maintaining a robust baseline sustainment network will be essential for integrating the modernized components across international operators.

Sources: RTX