Stringfellow - he wouldn't be the first FW pilot to react incorrectly to an engine malfunction in a helicopter - the old adage of 'when under pressure you revert to what you were first taught' may be applicable here. FW pilots when faced with an engine fail in the cruise will inevitably push forward to retain speed rather than flare. If you combine this with an adrenaline fuelled lowering of the lever because you know the rotor inertia is poor, you can quickly generate a low G environment which we know is a bad thing for Robbies.
Just supposition of course.