As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND HARILINE CRACKS (8 EACH) EXTENDING CHORDWISE ALL THE WAY AROUND THE NICKLE LEADING EDGE EROSION PROTECTION STRIP. CRACKS COULD NOT BE SEEN UNTIL A THOROUGH CLEANING OF THE BLADE LEADING EDGE WAS PERFORMED (REMOVAL OF BUGS/CARBON). SUBMITTER RECOMMENDED CLEANING AND VISUAL INSPECTION OF MAIN ROTOR BLADES AT REGULAR INTERVALS.