EC120 engine at 15 yr is now an inspection if below 3000 hrs and - if all is well - release to continue to use to 3000 hr. Inspection is £85k for the hot section at Turbomeca if nothing untoward is found. Prices as quoted to me as mine is going in next week.
In addition, you could take advantage of the certified extension (18 months) before sending the engine in. Given the slower market due to CV-19, I decided to send her in now.