What was found
DURING THE OVERHAUL PROCESS, THE FLYWEIGHT LINERS WERE REMOVED AND THE REAR HALF OF THE CRANKSHAFT WAS MAGNETIC PARTICLE INSPECTED. DURING THIS INSPECTION IT WAS DISCOVERED THAT A CRACK HAD DEVELOPED FROM AN ASSEMBLY RIVET HOLE OUT TO THE LINER BORE ON THE COUNTER WEIGHT ARM. UNKNOWN CAUSE. LINERS SHOULD BE REMOVED AT EACH OVERHAUL AND INSPECTED FOR CRACKS IN THIS AREA. (K)