President Volodymyr Zelenskiy dismissed Ukraine's Air Force Commander Mykola Oleshchuk on Friday, according to a presidential decree.
The dismissal was announced just a day after the Ukrainian military reported that an F-16 jet crashed and its pilot died while repelling a major Russian strike on Monday.
"I have decided to replace the commander of the Air Forces... I am eternally grateful to all our military pilots," President Volodymyr Zelenskiy said in his evening address.
He did not give a reason for dismissal but mentioned that personnel must be protected, and that there was a need to strengthen the command level.
Ukraine's General Staff said that General Lieutenant Anatoliy Kryvonozhka would temporarily perform the duties of commander.