As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PIT - FLT 385 - FLIGHT EN ROUTE PHL TO DEN WHEN TOP LT WING OVAL PANEL, ABOVE ENGINE NACELLE SHOWED MINOR SEEPAGE. NO FUEL IMBALANCE NOTED. FLIGHT DIVERTED TO PIT WHERE LANDING WAS WITHOUT INCIDENT. MAINTENANCE REPLACED FUEL TANK ACCESS PANEL AFT OF NR 1 PYLON ON TOP OF WING. LEAK CHECK OK. (W)