I'll put this out there, in case anyone hasn't heard this. I had ECI of San Antonio apply the Cerminil process to all my cylinders (O-435A) at overhaul. This annual inspection revealed a flat cylinder during the compression check. Looks like it's may be an exhaust valve issue(400 hrs SMOH). But I have found out that any cylinder with Cerminil is a throw-away, and can't be overhauled. Hopefully, my cylinder can be repaired(new seat and exhaust valve), but if it needed an overhaul- it's a dead duck.
If anyone is considering Cerminil, you may want to reconsider. Tom Robinson
If anyone is considering Cerminil, you may want to reconsider. Tom Robinson