As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE PILOTS REPORTED THAT THE FUEL GAUGE WAS READING ABOUT 5 GALLONS TOO LOW. AFTER TROUBLESHOOTING A NEW SENDER WAS INSTALLED. IT WAS FOUND THAT WITH SLIGHT VIBRATION ON THE TANK THE SENDER WOULD FLUCTUATE BY .2500 OF A TANK. ANOTHER NEW SENDER WAS INSTALLED, FUEL CALIBRATION WAS CARRIED OUT IAW MM. NO FURTHER ISSUES WERE FOUND WITH THE INDICATION SYS. THE OPERATOR HAS FOUND THAT THERE APPEARS TO BE 2 MFG.