A quick google search uncovered several articles on the 76 Crash.
It involved a Red Tail Hawk that hit the upper edge of the Windscreen and deformed the frame and pushed it back causing a loss of Engine Control.
Of note the Operator had replaced the original windscreens to save weight.
Safety Lessons from a Fatal Helicopter Bird Strike: Sikorsky S-76C++ N748P, 4 January 2009 - Aerossurance