What was found
FLT 4145 - ON TAKEOFF ROLL LEFT ENIGNE TORQUE INDICATION FLUCTUATED. TAKEOFF WAS ABORTED AND AIRCRAFT RETURNED TO THE GATE. PIT MAINTENANCE PERSONNNEL INSPECTED AIRCRAFT AND DISCOVERED A CONTAMINATED CANNON PLUG, LEFT ENGINE TORQUE SIGNAL CONDITIONAL. CLEANED CANNON PLUG AND GROUND RAN ENGINE IAW GARRETT MM 72-00-00. OPS CHECKED GOOD. AIRCRAFT RETURNED TO SERVICE.