"Gord Beaman" wrote

I'd love to have a bean counter to run this by. Just think of all
the manpower hours wasted by this unproductive occupation!. It's
like doing a complete teardown and rebuild of your car engine
every six months at a cost of half of the engine's worth. Nothing
short of ridiculous overkill.

Talk to any Nascar or Professional drag racer about engine tear-downs.

No matter what the bean-counter says, the winners run fresh engines,
and they don't last 6 months even. You only have to look at the monthly
inflight shutdown rate, and that number of hours is the right edge of the
bell curve.