As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ROUTINE MAINTENANCE, DISCOVERED CRACK ON MAIN ROTOR BLADE AT BLADE STATION 41.5 EXTENDING CHORDWISE FROM TRAILING EDGE ON BOTH UPPER AND LOWER SKINS ACROSS FINGERS ON TRAILING EDGE EXTENDING 6.3750 INCHES THEN FOLLOWING FINGERS OB, SPANWISE, 5 INCHES. SEPARATION OCCURED AS LIGHT CAN BE SEEN THROUGH CRACK. MAIN ROTOR BLADE SCRAPPED AND REPLACED WITH A NEW PART.