What was found
ON TAKEOFF POWER APPLIED, SMELL OF GUN POWDER SMOKE WAS APPAREMT, VISIBLE LIGHT SMOKE WAS APPARENT, AND WE ABORTED TAKEOFF RUN IMMEDIATLY. AFTER POWER REDUCRION SMOKE INTENSITY FELL. UPON ENGINE SHUTDOWN NO INDICATIONS OF ANY SMOKE OR SMELL. ONCE APU AIR CONDITION WAS TURNED ON, LIGHT SMELL/SMOKE. MX C/A: R&R AIR CYCLE MACHINE (ACM), OPS AND LEAK CHECKS GOOD.