As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ROTATION AND CLIMB ENGINE NR1 FUEL FLOW WAS ERRATIC AND EPR DROPPED ABOUT 10 PERCENT. ADVANCED THROTTLE TO MATCH ENGINE NR2 BUT EPR DROPPED AGAIN TO 1.6 AND WOULD NOT RESPOND TO HIGHER THROTTLE SETTINGS. FLIGHT CREW RETURNED ACFT TO DEPARTURE AIRPORT. MX DISCOVERED ENGINE INTERNAL FUEL LEAK, OUT THE TAIL PIPE. ENGINE NR1 REMOVED AND REPLACED. (K)