As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUEL LEAK LEFT ENGINE DURING FLT. 3500 LBS DIFFERENCE BETWEEN FMC AND CALC FUEL. VISUALLY CONFIRMED THE LEAK. EMERGENCY DECLARED. MOTORED ENGINE AND FOUND SIGNIFICANT FUEL LEAK COMING FROM HIGH PRESSURE FUEL PUMP OUTLET SUPPLY LINE TO FUEL CONTROL GOVENOR, LEAKING AT PUMP OUTLET DUE TO BLOWN O-RING. REPLACED THE O-RING IAW MM 73-11-03. LEAK CHECKED GOOD.