Sources

https://www.americansecurityproject.org/challenges-to-maintaining-ukraines-f-16s/
https://armyrecognition.com/news/army-news/2025/exclusive-u-s-approves-f-16-fighter-jet-support-for-ukraine-as-early-images-suggest-spare-parts-delivery
https://x.com/RALee85/status/1923238913952399553?ref_src=twsrc%5Etfw%7Ctwcamp%5Etweetembed%7Ctwterm%5E1923238913952399553%7Ctwgr%5E48dd4bdbd7542fe4dae7d544166d285242aa622d%7Ctwcon%5Es1_&ref_url=https%3A%2F%2Fbulgarianmilitary.com%2F2025%2F05%2F16%2Fus-made-f-16-fighter-crashes-in-ukraines-air-defense-battle%2F
https://newsukraine.rbc.ua/news/ukrainian-air-force-lost-f-16-while-repelling-1747373572.html