As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN ROTOR BLADE TIP RIB WAS FOUND SEPARATED. IT WAS DISCOVERED DURING THE 500-HOUR INSPECTION. TIP RIB AND DOUBLER SEPARATED. SUBMITTER STATED POSSIBLY CAUSED BY EXCESS PRESSURE APPLIED TO TIP CAP SCREWS DURING TIP CAP INSTALLATION. COMPONENT NR 7615009100051A.