BAE Gets $493 Million Contract to Upgrade F-35’s Electronic Warfare Suite Dec. 15, 2021 | By John A. Tirpak BAE Systems will upgrade the F-35’s electronic warfare system for the jet’s Block 4 upgrade under a $493 million contract awarded by Lockheed Martin, BAE systems said Dec. 15. The new system will go into F-35 production starting with Lot 17 in 2024.