As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE FLIGHT CREW REPORTED THAT THE NO1 ENGINE REQUIRES FIREWALL THRUST TO MAKE TAKEOFF POWER. SPLIT IN LEVERS AND AT IDLE N2 IS OVER 56%. THE MAINTENANCE VENDOR REMOVED AND REPLACED THE NO1 ENGINE AFT CONTROL CABLE (52" CABLE) WITH NEW CABLE. COMPLIED WITH ENGINE ADJUSTMENT AND POWER ASSURANCE RUNS. THE AIRCRAFT WAS RETURNED TO SERVICE