As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) REJECTED THE TAKEOFF ROLL DUE TO A WARNING LIGHT IN THE COCKPIT. REJECTED TAKEOFF DUE TO RT FUEL BYPASS ANNUNCIATOR. THE ACFT RETURNED TO BASE WHERE MAINTENANCE ENGINEERS TROUBLESHOT THE SYS AND DISCOVERED THAT THE FUEL BYPASS SWITCH WAS FAULTY. MAINTENANCE REPLACED THE SWITCH AND DISPATCHED THE ACFT WITH NO FURTHER INDICATIONS OF A DEFECT.