Lycoming piston pin plug failure
Over the past few years I have seen an increasing number of piston pin plug failures on Lycoming engines.
This usualy happens when a ridge forms in the cylinder at the point that the oil control ring reaches BDC, the piston pin plug then gets a little metal shaved off it each time it passes the ridge.
Has this happened to your engine?
If so can you post the following details:-
Type of engine.
Total time the cylinder has run.
Type of flying. (IE trainning, touring aerobatic etc)
Type of oil used.
Manufacturer of Cylinder. (IE Lycoming, ECI etc)
I am trying to see if there is a common thread to these problems.