What was found
NR 2 ENGINE TORQUE BEGAN SURGING/FLUCTUATING +-15 PERCENT AT TAKE OFF. CONTINUED FOR A COUPLE OF MINUTES WITHOUT OTHER GAUGE INDICATIONS. TRIED MANUAL FUEL CONTROL (DROPPED AS IT SHOULD TO 68 PERCENT TORQUE), RESELECTED ECU. FO COULD FEEL SURGES. AFTER STEADYING OUT FOR A COUPLE OF MINUTES, SURGES BECAME +- 20 PERCENT AND WE BROUGHT POWER TO IDLE, PROP MIN. - STABLE AFTER THAT. INSPECTED AND CHECKED NR 2 ENGINE POWER AND CONDITION LEVERS. FOUND NR 2 ENGINE OUT OF RIG. RIGGED NR 2 ENGINE POWER AND CONDITION LEVERS IAW DHC 8 ENGINE RIGGING MANUAL. GROUND RUN CHECK GOOD.