A place I did my training in the States was doing 200 hours a month in the IFR trainer R22, this meant they were being rebuilt every 13 months. One of the machines I flew was 6 years old with 11,000 hours on the datcon. Although that was probabaly the only original bit.
Great machines though, had 2 hours in one yesterday, after 18 months of flying the 92. Great fun, especially if you are not oversize
