Patria has completed Finland’s first locally assembled F135 jet engine at its new Linnavuori facility in Nokia, marking a watershed moment for Finnish defense industrial participation in the global F-35 program. The milestone, announced on September 3, 2026, represents far more than the assembly of a single propulsion unit—it signals Finland’s transition from acquiring advanced fighters to building the domestic expertise required to sustain them over decades.
The F135, developed by Pratt & Whitney, is the engine powering all three F-35 variants and generates more than 40,000 pounds of thrust. Under an agreement signed in February 2026, Patria will assemble F135 engines at Linnavuori through 2030, with the facility subsequently shifting toward maintenance, repair, overhaul, and upgrade (MRO&U) services for Finland’s F-35 fleet throughout its operational lifetime. The assembly work is expected to directly employ approximately 50 people at Patria between 2025 and 2030.
The timing positions Finland strategically ahead of its first F-35A arrivals, which are scheduled for autumn 2026 at Lapland Air Wing in Rovaniemi. Rather than receiving aircraft first and building supporting expertise later, Finland is advancing aircraft introduction, infrastructure, industrial capability, and sustainment preparation in parallel. This sequencing reduces dependence on overseas support and strengthens the resilience of F-35 operations on NATO’s northern flank during prolonged or high-intensity missions.
Pratt & Whitney already operates an international F135 sustainment structure incorporating maintenance and repair capacity in the United States, Norway, the Netherlands, Japan, and Australia. Finland’s emerging propulsion capability adds another layer of geographic resilience in Northern Europe. The company explicitly identifies distributed sustainment as increasingly important in contested environments, and the Linnavuori facility will contribute to that wider network. Patria’s role begins with assembly but is designed to develop toward future sustainment, strengthening an essential element of Finland’s future fighter readiness.
Petri Hepola, Patria’s chief program officer for F-35, stated that “the completion of the first F135 engine is a significant milestone and a strong start for F135 engine assembly in Finland,” adding that it “demonstrates the successful cooperation between Patria, Pratt & Whitney, the Finnish Defence Forces and the Finnish Ministry of Defence, strengthening Finland’s security of supply and deepening Patria’s role in the global F-35 supply chain.” Finnish Air Force F-35 programme director Colonel (ret.) Henrik Elo emphasized that “the fact that our Joint Fighter fleet will be equipped with engines assembled in Finland is a clear demonstration of the close cooperation between the Finnish and US defence administrations and industries.”
For the United States and Pratt & Whitney, the development demonstrates how the F-35 program can deepen allied industrial integration while spreading sustainment capability across trusted partners. Pratt & Whitney Military Engines President Jill Albertelli directly linked Finland’s first assembled F135 to strengthening the global F-35 sustainment network, expanding propulsion capability in Finland, and reinforcing the collective defense of Finland and its NATO allies. The cooperation is a strong example of U.S.–Finnish defense-industrial partnership producing capability with both national and alliance-level value.
Finland’s broader F-35 industrial participation extends beyond engine assembly. Patria also produces F-35 forward fuselages and landing gear doors as part of Finland’s order of 64 F-35A fighters, making the company the first partner outside the United States to assemble forward fuselages for the program. The 2024 framework agreement between Patria and Pratt & Whitney for F135 MRO&U activities gives Linnavuori a role extending far beyond the current production phase, positioning the facility as a long-term strategic asset for Finland’s defense-industrial base.
Sources
- Army Recognition — Patria’s completion of Finland’s first F135 engine on September 3, 2026, NATO sustainment architecture, and strategic significance for Northern Europe
- Airforce Technology — Engine assembly details, employment figures, MRO&U transition timeline, facility handover date, and quoted statements from Petri Hepola and Colonel Henrik Elo
- DataForSEO search results — February 2026 Patria-Pratt & Whitney agreement confirmation, F-35A arrival schedule for autumn 2026, and F135 engine thrust specifications
