April 2011—at 325 hours and 42 months
SMOH, and 189 hours and 24 months since
the teardown.
NOW WHAT?
I asked the local mechanic to send the con-
taminated oil filter media to Aviation
Laboratories in Kenner, Louisiana, for
scanning electron microscope (SEM) eval-
uation, and also to pull the propeller
governor and inspect the gasket screen for
the presence of metal. The mechanic
reported that the prop governor screen
was clean, suggesting that in all likelihood
the filter caught all of the metal and the
main and rod bearings were probably
not contaminated.
