As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: NR 1 ENGINE ACCELERATES SLOWER THAN NR 2. MOST NOTICABLE WHEN SETTING TAKEOFF POWER. REPLACED THE FOLLOWING COMPONENTS ON THE LEFT ENGINE HYDROMECHANICAL UNIT IAW CARD 73-94-12 (AALA202006249002), ENGINE FUEL PUMP PER AMM 73-11-01 (AALA202006299001) AND ENGINE ELECTRONIC CONTROL UNIT (EEC) IAW TASK CARD 71-94-04 (AALA202006299002). ACCOMPLISHED A SATISFACTORY LEAK AND OPERATIONAL CHECK IAW AMM 71-00-00.