What was found
AFTER ENGINE START THE PILOT ATTEMPTED TO TURN ON THE NR2 A/C INVERTER WITH NO RESULTS. AFTER SEVERAL ATTEMPTS SMOKE COULD BE SMELLED IN THE AIRPLANE, AT THAT TIME THE ENGINES WHERE SHUTDOWN AND MAIN BATTERY POWER TURNED OFF. A LINE SERVICE ASSISTANT NOTIFIED THE PILOT THAT SMOKE WAS COMING FROM THE DORSAL FIN INLET. THE PILOT GOT OUT AND OPENED THE AFT TAIL AREA EQUIPMENT/BATTERY COMPARTMENT TO DISCONNECT THE BATTERIES, THIS AREA WAS ALSO FULL OF SMOKE. AFTER REMOVING THE NR 2 FAILED INVERTER, BLACK DISCOLORATION FROM THE COOLING VENTS COULD BE SEEN AND A BAD SMELL WAS PRESENT.