As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED FUEL QUANTITY INDICATION ALWAYS ON ''E'' FOR LEFT TANK. FOUND THE FLOAT BLOCK WAS DETACHED FROM THE FLOAT SWING ARM. THE FLOAT BLOCK WAS SO BADLY WORN IT SLIPPED OVER THE RETAINING WASHER ON THE SWING ARM. POSSIBLE CAUSE, TOO SOFT OF A MATERIAL USED IN FLOAT BLOCK, AND NO INSERT TO PREVENT BLOCK FROM WEARING THROUGH. REF: IPC SECT VIII FUEL FIGURE 47. (X)