What was found
MBJ - 909 - EN ROUTE MIA/EZE - DURING CRUISE, SMOKE AND NOXIOUS ODOR NOTED IN COCKPIT AND CABIN. EMERGENCY DECLARED, ACCOMP ABNORMAL PROCEDURES, DUMPED FUEL AND DIVERTED TO MBJ, LANDING WITHOUT INCIDENT. CHECK REVEALED NR 3 ACM AS SOURCE OF SMOKE/ODOR. PLACARDED NR 3 AIR CYCLE MACHINE INOPERATIVE AND REPLACED ALL COALESCER BAGS. ACCOMPLISHED GROUND ENGINE RUN AND ACCOMPLISHED PACK BURNOUT PROCEDURE FOR NR 1 AND 2 ACM. A/C MX FERRY MBJ/MIA. REPLACED NR 3 ACM. ACCOMP GROUND ENG RUN AND OPERATED ACY WITH NO DEFECTS NOTED. REMOVED PLACARD. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)