What was found
FLIGHT CREW PERSONNEL REPORTED THE DURING TAXI IN TO THE GATE, THE RIGHT AIR CONDITIONING SYSTEM BEGAN PRODUCING A STRONG SMELL AND SMOKE, LEFT PACK NORMAL OPS, PACK OFF STILL PRODUCED SMOKE. MAINTENANCE PERSONNEL REMOVED AND REPLACED THE RT AND LT COALESCER BAGS IAW 21-20-02, SERVICED APU IAW 12-12-01, LEAK AND OPS CHECK, NO DEFECTS NOTED. AIRCRAFT RETURNED TO SERVICE.