What was found
SMOKE IN AIRCRAFT AT FL300. EMERGENCY DECLARED. AIRBORNE SMOKE WAS IN CABIN AND FLT DECK UNKNOWN SOURCE. MEL 14AUG24 01:39 SYR C22718 21-15-2 AIR CONDITIONING PACKS C/W FLT CREW PROCEDURES. TROUBLESHOOT SMOKE IN CABIN AND PACK 1 SHUTDOWN.FOUND Y-DUCT AT DUAL HEAT EXCHANGER WITH HOLE AND SMOKE RESIDUIE IN PACK 1 PANEL WITH BLOW DUCT AT CONDENSER.REMOVED AND REPLACED PACK 2Y-DUCT IRW AMM 21-60-01. REMOVED AND REPLACED DUCT IN PACK 1 IRW AMM 21-51-04 RUN PACKS 10MINS NO SMOKE OR SHUTDOWN.OPS CHECK GOOD OK FOR SERVICE AT THIS TIME,CLEAR MEL 21-15-02.