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When I ran a flight school in Florida, we had a fleet of 172s. They had hundreds of hours per year put on them, and the spinners generally only lasted 2-3 years before they developed bad cracks. The bulkheads never seemed to fail, but the spinners would develop cracks that eventually could not be safely stop-drilled anymore.
Replacing spinners was so common that we kept a supply of spares. Often the instructors would do the swap with their students. I did several myself. There's really not much too it, just be certain to get the screws in tight so they don't vibrate out. The A&P would sign it off later. I don't recall him ever having any issue with the work that had been done by the instructor/student.
YMMV
Last edited by mshac : 02-01-24 at 05:57 PM.
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