I put forward this theory in post #143
The cockpit transcript was depressingly similar. The captain advised the co-pilot (pf) to turn around. As he was Chinese without Level 4 in English this was relayed by the interpreter. He queried the heading and this also went back and forth through the interpreter. When it was resolved he commenced the turn but half way round the helicopter struck the top of the hill killing all three.
The radar was found to be 5 degrees nose up which would have masked the coast close up in front of them.