As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKEOFF ROLL, NR 1 ENGINE ROLLED BACK APPROX 10 PERCENT. NR 1 THROTTLE WAS PUSHED UP AND ALL INDICATIONS WERE NORMAL. ON CLIMBOUT, THE THROTTLES WERE SPLIT APPROXIMATE 3 AND INCREASED WITH CLIMB. AIRCRAFT RETURNED TO MCO WITH NO PROBLEMS. REMOVED AND REPLACED NR 1 ENG FUEL PUMP AND FUEL CONTROL PER M/M. LEAK AND OP'S CHECK GOOD. PERFORMED FIELD TRIM PER BOEING M/M.