As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) FUEL FILTER WARNING LIGHT WAS FLICKERING IN FLIGHT. WHEN AME INVESTIGATED FAULT IT WAS FOUND THAT THERE WAS FUEL CONTAMINATION. FUEL SYS WAS DRAINED. ACFT WAS REFUELED AND DURING THE GROUND RUN THE AUX FUEL PUMP WARNING LIGHT WAS FLICKERING. AUX FUEL PUMP REPLACED.