What was found
DURING INSPECTION FOR AN OIL LEAK, FOUND THE ENGINE CYLINDER HEAD CRACKED BEHIND THE ROCKER COVER AREA AND EXTENDING BEHIND THE INTAKE VALVE SPRAY. ONE DAY LATER, FOUND SIMILAR CRACK ON A DIFFERENT AIRPLANE WITH THE SAME MODEL ENGINE. AFTER CLOSE INSPECTION, UNABLE TO DETERMINE REASON. FIRST AIRCRAFT CESSNA R172K, ENGINE IO360K, S/N 355310. SECOND AICRAFT PIPER PA34200T, ENGINE LTSIO360E, S/N 306232.