What was found
FUEL LEAK OBSERVED DURING FLIGHT FROM TOP OF LEFT WING. CAPTAIN TOOK PHOTO DURING FLIGHT SHOWING FUEL COMING FROM LH WING UPPER SURFACE IN THE AREA OF THE OVERWING FUEL CAP. INSPECTED CAP ORING- FOUND INTACT BUT QUITE COMPRESSED. A/C AOG AWAITING NEW CAP FROM LHR. FITTED LH OVERWING FILL CAP IAW AMM 28-11-04 REV 128. P/N 38222-3 M/E 19-2811-3-0007. REFUELED LH WING TO 40700LBS, NOTING GREATER THAN 39,700LBS, REQUIRED TO LEAK CHECK OVERWING CAP. NO LEAKS OBSERVED. A/C OK FOR CONTD SERVICE.