As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 3254 -ATB- PERFORMED AN AIR TURN BACK TO ATL DUE TO RIGHT ENGINE THRUST LEVER DISAGREE MESSAGE. THE RIGHT ENGINE HAS BEEN PULLED BACK TO IDLE. CORRECTIVE ACTION: FOUND HIGH RESISTANCE IN J3 HARNESS WIRES. REPLACED J3 HARNESS ON THE RIGHT ENGINE. RAN ENGINE AT CLIMB POWER. ALL CHECKS GOOD.