What was found
FLT#1454, SJU-FLL. "FUMES/ODOR AFT GALLEY MILD AFTER PACKS TURNED ON, WORST AFTER TAKE OFF PWR AND CLIMBOUT UNTIL 12,000 FT . ODOR CAME BACK DURING ARRIVAL PASSING 21,000 UNTIL LANDING . DECLARED EMERGENCY ON ARRIVAL . CAPTAIN ALSO SMELLED IT ON ARRIVAL VERY MILD ODOR; COMPLIED WITH W/O 1446035 APU INSP & CLEANING, BELLY INSP & CLEANING, LEVEL C ECS DECON. REPLACED RECIRC & OZONE FILTERS. DURING APU INSP FOUND LEAK AT LOAD COMPRESSOR TO GEARBOX SPLIT LINE. REFER TP MDDR 596212 APU MEL (INOP). FINAL CABIN AIR QUALITY CHK NORM"