As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUEL DRIPPING FROM THE BOTTOM COWL OF NR 1 ENGINE. ACFT GROUNDED. WHILE ACCOMPLISHING ENGINE DRAINS AND VENTS INSPECTION WITH ENGINE RUNNING FUEL STARTED TO LEAK OUT FROM THE HMU ATTACHMENT TO THE FUEL PUMP AT STEADY RATE AND ALSO FROM THE FUEL PUMP PAD DRAIN AT A RATE OF 1 DROP PER 10 SECONDS. REPLACED THE FUEL PUMP, DIFFERENTIAL SWITCH, & OIL/FUEL HEAT EXCHANGER.