What was found
AFT SMOKE DETECTOR ILLUMINATED ON SHORT FINAL. EVACUATED AIRCRAFT AFTER LANDING. SMOKE WAS OBSERVED IN AFT UPPER COMPARTMENT. FIRE DEPT CLEARED AIRCRAFT, REPLACED NR 11 SMOKE DETECTOR. INSPECTED AND FOUND RIGHT COALESCER BAG NOT PROPERLY INSTALLED. REPLACED COALESCER BAG. INSPECTED DUCTING IN AFT CARGO COMPARTMENT. NO DEFECTS NOTED. INSPECTED FREIGHT WITH NO CAUSE OF SMOKE FOUND. SUSPECT SMOKE WAS ACTUALLY MOISTURE/CONDENSATION.