Originally Posted by
cats_five
Unless there is something unusual about the Vikings or their airworthiness regime they have many years of life before relifing. K21s come with a 12,000 hour life which can be extended at least once by 6,000 hours, and I've not heard that grob 103s are substantially different.
The Vikings are lifed at 27,000 launches, not hours. Don't ask the logic.