Paul:
I would take Fred up on his offer next time your due for annual. He's pretty damn good -- it was great to meet him at our OKC fly-in a couple of years ago.
I'm a lawyer that does both plaintiff and defense work, including aviation law. I know of a couple of shops local to me that have a similar view to your shop's. However, it's a business decision which can be convenient to them. Thousands of shops use the prevailing standards for annuals for Part 91 birds and never have a problem.
However, if I had endless resources, I would probably keep my brand new jet, my flight crew, and my personal airport in accordance with commercial Part 135 standards.
But to be fair, I believe that you are flying a TSIO which I have heard are a bit more sensitive than us normally aspirated folks.
It would be interesting to see what other, more experienced 337 drivers say about TBO. I have had a couple of engines go well past TBO -- but compared to most of these guys, I'm pretty green.
FWIW
Keven
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