What was found
FLT#2304, SJU-JFK. 'ODOR SIMILAR TO MARKERS ECS NOTED AT12000 DESCENDING TO 11000, EYES BURNED, ALMOST A BITTER TASTE MOUTH; C/W FIM 21-22-00. PERFORMED GVI OF ENGINES AND APU. NO DEFECTS NOTED. COULD NOT REPLICATE ODOR FROM ANY BLEED SOURCE. PERFORMED ENGINE AND APU DUCTING BURNS AS APPLICABLE AND REPLACED BOTH RECIRCULATION FILTERS PER AMP 21-22-03. AC OK FOR CONT SVC.'