Deeper, your "over a third destroyed" got me researching, and I'm afraid you're being overly pessimistic and thus potentially libellous.
This website
http://www.markusherzig.com/kmax/kmaxprod.htm chronicles the production history of the K-MAX, and lists 38 aircraft including 1 for ground trials. Of these 11 are recorded as written off, plus two others (#0014, #0025) have been repaired after accidents. Thus 13 accidents for 37 flying aircraft is greater than a third, although if you are looking at "destroyed aircraft" it's still less than a third, but admittedly not by much.
Clicking on the MSN on the left hand side, you get individual airframe details. For example, #0006 is noted with 16,500 airframe hours in 10 years - which suggests to me a couple more aspects for SASless' list - the hostile environment these aircraft work in, and the number of hours being flown per aircraft.