What I discovered recently and wasn't aware of is that they are lifex'd on hours whatever components one changes. Once that airframe reaches that time frame, the cab is worthless.......... [For instance an R44 is lifex'd to say 2400hrs, the end.....can that be right?].
I dunno; I'd say that pretty much sums it up. The 12 year old/2,200 hour R22 is sent back to the factory for a complete re-build for around 85-90% of the cost of a brand new one. Some components can be re-used but not many.
Cheers
Whirls