Wow... I guess our guys have some good company!!!
I talked with some folks at Sikorsky last week and they have heard 'anecdotal' stories but no reports of any aircraft being bent from this type of event.
I asked about the possibility of a collective lock and was told that on the risk management curve, the potential outcome from having a pilot accidentally pull the collective instead of the parking brake was overshadowed by the potential outcome of having a collective lock inadvertently engaged in flight.
We are leaning towards an SOP amendment requiring the throttles to be brought to idle prior to brake engagement, for normal operations. We might add having the co-pilot guard the collective for those situations where bringing the throttles back is not prudent.
Thanks for the feedback.
wde