As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUEL SENDING UNIT READ EMPTY WITH FUEL TANKS FULL. REMOVED FUEL CELL AND FOUND FOAM FLOAT ASSY BROKEN OFF FROM SENDING UNIT ARM. THIS IS THE THIRD FOAM ASSY FOUND WORN IN THIS MANNER. DUE TO THE POSSIBILITY OF INACCURATE READINGS AND THE INABILITY TO INSPECT THIS AREA WITHOUT THE COMPLETE REMOVAL OF THE FUEL CELL, SUBMITTER RECOMMENDS A NEW DESIGN FLOAT BE INSTALLED WITH A METALLIC BUSHING FITTED INTO THE FOAM FLOAT TO REDUCE WEAR.