Shy Torque, thank you for the link to the L100-30 fatal accident at HKG 22.09.1994. It had eerie reminders of XV180 at RAF Fairford 24.03.1969 as posted by Tengah Type:-
https://aviation-safety.net/database...?id=19690324-1
Your link to that of PK-PLV's accident summary leads in turn to the very detailed, thorough, and excellent report by the HKG CAA, with input by the UKAAIB, the RAF, and the aircraft, engine, and propeller manufacturers:-
http://ebook.lib.hku.hk/HKG/B35839806.pdf
For those interested I would point to the conclusion that the most probable cause was the failure of the #4 throttle cable system (pdf P80) , the cables as fitted (7x7 carbon steel, rather than the later 7x19 stainless steel ones - see pdf P89), and the sheer complexity of the engine control cable runs (pdf P's 157, 158, and 162).
Of course we must await an interim report at least of the OP tragedy before ascribing to it a similar cause, but the vulnerability of the Hercules to an engine control cable break at a pulley, fairlead, or due corrosion, etc, in these two accidents alone is indication of it being somewhat of an Achilles Heel to this very successful workhorse.