As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THAT THE FUEL DOOR WAS INDICATING OPEN DURING FLIGHT. THE CREW RETURNED TO KPHL AND LANDED WITHOUT INCIDENT. MAINTENANCE FOUND TWO LATCHES OPEN ON THE FUELING DOOR AND AN INTERMITTENT SWITCH. MAINTENANCE SECURED THE LATCHES SHUT AND PLACED THE INTERMITTENT SWITCH INDICATION ON MEL. THE FUEL DOOR INDICATION MEL WAS CLEARED IN KCMH ON 4/23/11 WHEN THE FUEL DOOR INDICATION SWITCH WAS REPLACED.