As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RETURN TO GATE DUE TO NR 1 ENGINE FUEL LEAK. FUEL OIL COOLER LEAKING FUEL FROM DRAIN MAST. TROUBLESHOT & RAN ENGINE 2X5 MIN IDLE TO INSPECT FOR LEAKS ON NR 11 DRAIN MAST NR 1 ENG. AFTER IDLE RUNS, CHECKED FOR LEAKAGE FOR OVER 5 MIN, AND NO DROPS NOTED ON NR 11 DRAIN MAST NR 1 ENGINE. PER MM OK FOR SERVICE.