As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WING O' FULL (L) CASS MESSAGE CAME ON DURING DESCENT, AND STAYED ON FOR APPROX 4 MINUTES. FUEL WAS DUMPING FROM LT WING WHILE MESSAGE WAS DISPLAYED. MESSAGE WENT OUT AFTER WE YAWED THE AIRCRAFT REPEATEDLY. INSPECTED AND TESTED LT WING VENT FLOATS. NO DEFECTS FOUND. INSPECTED VENT TUBING AND FOUND CLIMB VENT TUBE CLEARANCE TO UPPER WING SKIN OUT OF TOLERANCE. REPOSITIONED VENT TUBE TO BE IN TOLERANCE IAW MM 28-10-04.