As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WING BODY OVERHEAT (L) ILLUMINATED AFTER TO QRH ACCOMPLISHED. REMINDER OF FLIGHT SINGLE PACK CHECKED FOR LEAKS AND FOUND APU CHECK VALVE IN KEEL BEAM AREA LEAK. REMOVED AND RESEATED CLAMPS, RECHECKED AREA FOR LEAKS NONE NOTED. ALSO CHECKED BOTH PACK BAYS, NO LEAKS NOTED.