As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DIVERTED TO BNA DUE TO THE FLIGHT CREW REPORTING THAT FUEL APPEARED NOT TO BE BURNING OUT OF THE LEFT WING TANK. MAINTENANCE VERIFIED THAT THE CROSS-FEEDS AND DEFUEL VALVES WERE OPERATING NORMALLY. THE LEFT TANK FUEL BOOST PUMP OPERATION CHECKED GOOD. A HIGH POWER ENGINE RUN WAS PERFORMED. MAINTENANCE WAS UNABLE TO DUPLICATE THE FAULT. THE CHECK VALVE FLUSH PROCEDURE WAS PERFORMED AND THE AIRCRAFT WAS RETURNED TO SERVICE.