What was found
ON APPLYING POWER FOR TAKEOFF AT ABOUT 75 KTS, POWER WAS SET. LEFT TORQUE INDICATION WENT TO ZERO AND L ING LIGHT CAME ON. WHEN POWER LEVERS RETRACTED BELOW FLIGHT IDLE, TRQ CAME BACK AND ING WENT OFF. INSPECTED AND RESECURED LEFT AND RIGHT TORQUE INDICATION CONNECTORS. PERFORMED ENGINE RUNS AT POWER, NO DEFECTS NOTED IAW 77-13-05.