My eci components were certified components, but the engine did not have a serial number. I let someone fly my plane, they had a prop strike, insurance company mandated a tear down inspection. Connecting rods had ADs that did not allow them to be reinstalled once removed, all 4 cylinders had ADs and scoring, two pistons had chunks missing. ECI was bought out by another company, so I had no recourse on a 200 hour engine. None of the damage was prop strike related. Penn Yan did the tear down and ran AD checks and inspections on every component. In the end it cost me 10k for the cost of the new components, and my insurance company paid all the labor, so at the end of the day I got a new lycoming (mostly) engine. Penn Yan did a wonderful job on new engine... it was a blessing in disguise.