Suggest from the altitude, the terrain and the the tricky hover situation that the crew were facing, the shear downdraft and subsequent rotor wash have sent them on a little excursion.....the Blackhawk is notorious for its rotor wash especially as its an extremely powerful helicopter. Once a chopper enters this envelope the chances of recovery are slim, especially once again in these extreme operating conditions. Vortex ring, a phenomena that is more common to some choppers than others, is another possiblity but only the rotor heads could offer more valuable input on this.
Zone hot, we have casualties....request dustoff...."Albatross 414 is up....call your location....".
