To their credit, Kawasaki may have managed it with the BK117
Our's is quite watertight, although the stories of leaky aircraft of other types, are legion.
We caused a bit of a flap with VicPol radio development some years ago, when we requested motorcycle control heads for the panel on the 365C Dauphin. They thought we were joking when we explained that at least the motorbike unit was waterproof
