Originally Posted by
Lonewolf_50
A Service Life Extension Program ... without actually doing anything? That's an odd claim...
I did wonder how the original 30 year lifespan was arrived at and in turn, how NHI are now instead contemplating a 50 year lifespan. I think they might be saying no major re-working of the airframe would be needed?? They are also probably not saying any individual aircraft are necessarily expected to last 50 years of service, rather the basic design. That has certainly been the case for many other aircraft types, including some helicopters.
To put 50 years into perspective, consider the currently active thread "For Wessex fans". G-WSEX was built in October 1966 so is now 57 years old and still flying (though with some pauses through life by the look of it:
https://www.helis.com/database/cn/792/ ). Not sure what forms of significant upgrades the Wessex had through its life. In the meantime it would simply be a case of managing to get hold of airworthy spare parts for the type to keep it flying!