Another Bolkow cost debacle I remember was an 1800 hour check that began to overun in time due to structural repairs and lack of manpower.
To save time the chief eng decided to send the hydraulic pack to rotorwreck for inspection.
Back it came with a bill larger than the budget for the whole check. Two valves had to be replaced at £7500 each and these were second hand and half price!!!!!!!
Half a dozen control bolts cost over £1000. This is about 14 years ago.
The truth is I like the 105 it has made me a lot of money over the years, but they can remove money faster than your wife and daughters with an open unlimited check book.