As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A SCHEDULED INSPECTION, FOUND 2 FASTENERS MISSING FROM THE LT SIDE OF THE DORSAL FIN ASSY. UPON FURTHER INSPECTION, FOUND THE FRESH AIR DUCT ASSY TO BE CRACKED IN 2 PLACES. IT APPEARS THAT THE CRACKED DUCT ASSY ALLOWED AIR PRESSURE TO EXPAND THE DORSAL FIN AND EVENTUALLY PULL THE RIVETS FROM THE LT SIDE DORSAL FIN SKIN.