As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
A MODERATE AMOUNT OF REPAIR DEBRIS WAS FOUND AT THE BASE OF THE FIN AND A WATER LINE WAS SEEN ON THE FIN SKIN. THIS PROMPTED DISASSSEMBLY OF THE FIN DRAIN SYSTEM WHICH WAS CLOGGED COMPLETELY BY REPAIR DEBRIS. RUDDER TRIM AND ELEVATOR CABLES RUN THROUGH THIS AREA AND COULD BE AFFECTED BY ICE BUILD-UP OR CORROSION.