What was found
PRIOR TO THE INSTALLATION OF MAIN ROTOR HEAD ASSY, SN 493, AD 73-20-03 WAS ACCOMPLISHED. THE MAIN ROTOR HUB, SN 493, WAS FOUND CRACKED INSIDE THE HUB IN THE AREA OF THE CONTROL ROTOR STUDS. METHOD OF INSPECTION WAS DYE PENETRANT. THE ASSY RECORDS INDICATE THE ASSY HAD ZERO HOURS SINCE OVERHAUL. (X)