I hate to inject technical questions into a thread here at Rotorheads but perhaps this is the time.
The Huey Cobra (for sure the Two Bladed Head models) had a tendency to do exactly what the Greek Apache did....smack the ground with the Collective Lever well up under the Pilot's Arm Pit while the Cyclic was nudging his Wedding Tackle.
You reckon the Apache Rotor system and flight control linkages might be susceptible to the same sort of thing?
Thinking "Pitch Cone Coupling" which is a section of the AH-1S Flight Manual contained at the Link below.
https://books.google.com/books?id=pX...upling&f=false