As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DEPARTING, AN UNUSUAL NOISE WAS DETECTED FROM THE NR 2 ENGINE. THE AIRCRAFT RETURNED TO POINT OF DEPARTURE. THE LEADING EDGE PROTECTION STRIP ON ONE BLADE WAS SEPARATED 6 INCHES AT THE OB END. MAINTENANCE REMOVED THE STRIPS FROM ALL 4 BLADES AND THE AIRCRAFT WAS RETURNED TO SERVICE AFTER GROUND RUN YIELDED NO VIBRATION OR UNUSUAL NOISE.