What was found
TURNED ON ENGINE BLEED AIR, APPLIED TAKEOFF POWER, THEN CLIMBED THROUGH 3000 FEET AND NOTICED BURNING SMELL OF ELECTRICAL AND LIGHT SMOKE FROM CABIN AND COCKPIT VENTS. SECURED ALL ENGINE BLEED AIR AND RE-CIRCULATION AND GASPER FANS, SMELL DISAPPEARED. R&R LT ACM IAW MM. OPS CHECKED GOOD.