What was found
FLIGHT 5334 - STL-BNA - ON SHORT FINAL, SMOKE AND BURNING/ELECTRICAL ODOR IN COCKPIT AND CABIN. APU WAS OFF, PACKS ON, ANTI-ICE OFF, ENGINES AT 60 PERCENT N1. OPERATED COCKPIT AND CABIN RECIRCULATION FANS IAW EMB MM 21-24-01. BOTH TEST NORMAL. RAN APU, BOTH ENGINES, BOTH PACKS, BOTH RECIRCULATION FANS; COULD NOT DUPLICATE SMOKE ODOR.