What was found
AIRCRAFT AND CREW EXPERIENCED ENGINE ROUGHNESS AND THE ENGINE QUITTING WHILE IN FLIGHT. THE CREW AND AIRCRAFT MADE AN UNPOWERED SAFE LANDING AT KARR (HOME AIRPORT). INITIAL INSPECTION FOUND THAT THE PROP WAS FREEWHEELING WITH NO RESISTANCE. NR 3 CYLINDER HAD A DENT ON THE ROCKER COVER. WE REMOVED THE ROCKER COVER TO FIND THAT THE ROCKER PIN LEFT HAND EAR HAD SHEARED. WE STOPPED THE INSPECTION AT THAT TIME. WE WILL SEND THE ENGINE TO POWER BY BLUEPRINT (ENGINE OVERHAUL REPAIR STATION) MID TO LATE AUGUST FOR FURTHER INSPECTION.