On Sunday, December 6, 2009 at 2:06:24 PM UTC-5, wrote:

We also change bolts at least once a year.
UH

Is this just 'common sense' or is it recommended in a maintenance manual or AD?

I'm looking for information specifically about the failure of one of these bolts. I've scanned through the Piper PA-25 AD index and did not find an AD that mentions them. Are there known cases of these bolts failing and gear collapsing?

Maybe the information is out there and I just don't know how to find it. Sharing of your expertise is very much appreciated.