I was wondering about the prop composition, too. So it was wood. Safety wire
might not help, but wood props do require regular retorqueing for just the
reason you state. And the probable reason for the bolt failures was due to
the bolts becoming undertorqued due to wood shrinkage.

mike

"Bob Moore" wrote in message
46.128...
mike regish wrote
A question I have is, were the prop bolts safety wired?

Doesn't matter...I had this happen to me once...same outcome,
un-eventful landing on the runway.

With a wood prop, when cold, dry, winter sets in, the wood
shrinks away from the previous torque settings allowing the
bolts to fail in just a few minutes. All of the safety wire
in the world doesn't help.

Bob Moore
1/2 VW Powered MiniMax