As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED FLUCTUATIONS IN THE FUEL QUANTITY INDICATOR. FLUCTUATED FROM ZERO TO KNOWN QUANTITY. SOLDERED WIRE CONNECTION AT ZERO ADJUST RESISTOR, WAS CORRODED AND LOOSE. RE-SOLDERED AND RECALIBRATED FUEL QUANTITY SYSTEM. SUBMITTER RECOMMENDED THAT HEAT SHRINK COVER OVER SOLDER CONNECTION IS INSTALLED. (X)