I heard that recently they flew an airplane right into it. Pilot Sum Ting Wong and co-pilot Wee Tu Lo were last heard on the radio apparantly calling someone called Ho Lee Fuk shortly before they slammed into a stalactite.
Another team of intrepid explorers having acquired a much improved flying craft followed the identical route but instead were heard to have been calling out “Mike Hunt, Mike Hunt” until the radio went dead, were found months later deep inside a narrow passage way, lodged in-between two passage way walls.