Or that He129? the one with the 75MM cannon
I don't even have to look it up to know an aircraft that small cant withstand the recoil of a 75mm anything, much less a high velocity anti tank gun. IIRC, 50mm is the largest gun put in an aircraft for this role. One of these aircraft was the He129 i think, perhaps confusing your calibers?
Before anyone even goes "what about the B-25H!?", that was a larger aircraft that was built better. Not to mention it was a howitzer, with a much lower muzzle velocity.
EDIT:
Well I'll be damned. Someone was stupid enough to do it.