Apparently Russia had 899 military helicopters prior to the start of the invasion, with 134 having been produced in 2021. They claimed they then produced 296 in 2022 after the war ramped up, but claims of substantially increased military production appear to be generally unreliable. Still, being able to take out 7% of annual production for even the most generous estimate in a single strike is nothing to scoff at. And up until July of this year, Russia had lost about 90 helicopters making this single strike a significant portion of their total losses thus far.

Even if the numbers lost aren't on their own crippling, this will also force Russia to either relocate its helicopter forces further from the front lines (reducing the overall utility of its helicopter fleet) or invest substantial resources into better defending its bases in the area (of course coming at the expense of defending other critical locations).