LONDON — After encountering delays in the F-35 upgrade known as Technology Refresh 3, or TR-3, the jet’s producer Lockheed Martin expects to complete the major project by 2032 at the latest, according to senior company representatives.
“TR-3 is a new foundation to move forward Block 4 integration that started in 2018 and will continue until 2030 or 2032, so for another five to seven years,” Jim Post, the director of the manufacturer’s F-35 Partner Customer Program, told Defense News at the 2025 DSEI UK show in London.
“Block 4 means the aircraft’s evolution, and TR-3 makes the F-35 as much as 25 times faster. It gives the jet’s systems a much improved memory, and its tactical displays for pilots are capable of implementing all processes at a faster speed,” Post said.
As the F-35 Joint Strike Fighter program is struggling with cost overruns, manufacturing delays and supply chain bottlenecks, the U.S. Government Accountability Office said in a Sept. 3 statement the “program plans to reduce the scope of Block 4 to deliver capabilities to the warfighter at a more predictable pace than in the past.”
The delayed TR-3 which is critical to the Block 4 modernization effort “was the primary driver of late aircraft deliveries in 2024,” according to the GAO. Last year, Lockheed Martin “delivered 110 aircraft. All were late by an average of 238 days, up from 61 days in 2023.”