As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PUMP WAS HEARD TO MAKE STRANGE NOISE ON FIRST START OF THE DAY. LATER THAT DAY THE PILOT SHUT DOWN BRIEFLY. ON NEXT START UP ATTEMPT AUX FUEL PUMP CAUTION LIGHT CAME ON AND CIRCUIT BREAKER POPPED. PILOT RESET BREAKER BUT IT IMMEDIATELY POPPED AGAIN. MAINTENANCE REPLACED AUX FUEL PUMP.