What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED INBOUND INTO FLL DUE TO THE FLIGHT CREW REPORTING A VERY MUSTY ODOR DESCENDING THROUGH 15000 FEET AND IT GOT WORSE UNTIL LANDING. MAINTENANCE FOUND THE APU LEAKING OIL AND REPLACED IT PER TASK CARD 26L31049003. MAINTENANCE ALSO FOUND THE LT PACK ACM SEZED ALONG WITH DAMAGE TO THE FAN PLENEUM CHAMBER DAMAGED / BROKEN. MAINTENANCE ALSO FOUND BROKEN FINS ON THE MAIN AND PRIMARY HEAT EXCHANGERS. MAINTENANCE REPLACED ACM (AALA202602209074), FAN PLENUM CHAMBER (AALA202602207956), MAIN HEAT EXCHANGER (AALA202602201204), PRIMARY HEAT EXCHANGER (AALA202602200401) AND THE REHEATER (AALA202602202627). A SATISFACTORY LEAK / OPERATIONAL CHECK WITH NO ISSUES OR ODORS NOTED.