USA has signed the F-35 Lightning II Block 4 agreement with Lockheed Martin. Under the agreement amounting to US $ 130,359 million, company will carry out the preliminary work required for F-35 Block-4 Modernization Phase II.
The requirements of the aircraft will be identified and analysed. Design works for weapon capabilities and air system for maturation of systems will be performed with Block 4.1 participiants. 64% of the work to be carried out for FMS customers is expected to be completed in 2020.