As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EXPERIENCED VIBRATION DURING TAKEOFF FROM OFFSHORE PLATFORM. THE AIRCRAFT WAS RETURNED TO AND LANDED AT THE SAME PLATFORM. FOUND SKIN SEPERATION FROM LEADING EDGE ABRRASION STRIP AT TIP APPROXIMATELY 1.5 INCHES CHORDWISE X 9.75 INCHES SPANWISE.