As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: #1 ENGINE THROTTLE SPLIT 1/2 KNOB LESS THAN #2 ENGINE THROTTLE FROM TAKEOFF TO ~12,000'. N1 RPMS MATCHED. ACCOMPLISHED FIM 37F00 TASK 801 EEC BITE. FOUND #2 ENGINE T12 SENSOR FAULTED. ACCOMPLISHED AMM 73-21-05, FOUND T12 CONNECTOR NOT PROPERLY CONNECTED. RECONNECTED PROPERLY AND PERFORMED A SATISFACTORY OPERATIONAL CHECK.