Please help to identifu an adventure movie from 80s (maybe early 90s, but unlikely)
Ex-military and scientist are going through jungle in the search of treasure.
They find remains of a helicopter with a skeleton with a gun. It appeared to be ex-military man ex-copilot.
Threasure map highlights 3 dangers. 2nd danger was statues with lasers, 3rd danger was a giant blind snake, which was attracted by the scent of the map.