BMK, check out
http://www.lighthorseaircav.com/s-a-history-lesson.html for a similair incident during the SEA era. Regards.
BMK,
Quite a long article , as on my last , here it is pasted to save time:
In D Troop, 3rd Squadron, 5th Cavalry, the Scouts, call sign "War Wagons", carried their gunner/observers in only the left front seat with the pilot in the right. With the rear of the ship nearly empty there was always room for picking up a crew that had been shot down. Each aircraft had a 7.62mm mini-gun mounted on the left side. The gunner had an M60 machine gun and we only made left-hand turns. Left hand turns required a little more power but the possibility of encountering "Hughes tailspin" was minimized. The tailspin arose during slow right turns at high power settings, finally resulting in loss of tailrotor effectiveness and the helicopter would spin out of control. Not a good condition when flying very close to the ground!
Regards.