What was found
EN ROUTE FROM PHL TO MCO, A COCKPIT & CABIN ODOR WAS NOTICED 3 TO 4 TIMES IN FLIGHT. ODOR WAS VERY NOTICEABLE BY CREW & PAXS IN ENTIRE ACFT. NOTICED IN DESCENT EVEN WITH BLOWER, EXTRACT, CABIN FANS & GALLEY CABIN FANS OFF NO SMOKE, NO ECAMS. NOTHING UNUSUAL IN LAVATORY'S. VERY STRONG ODOR, LIKE A LIT SULPHUR MATCH. FLIGHT ATTENDANT'S REPORTED A BURNING OF EYES AS WELL. DECLARED AN EMERGENCY INTO MCO & THE FLIGHT LANDED WITHOUT ANY PROBLEMS. TROUBLESHOOT CABIN AIR QUALITY CARD AS REQUIRED. FOUND C/B X18 (122VU) POPPED - "AIR COND/RECIRC FAN/L/SPLY". C/B WOULD NOT RESET. FOUND FORWARD RECIRCULATION FAN SEIZED. REMOVED AND REPLACED LEFT RECIRCULATION FAN PER AMM 21-21-51-00-001-A/400-001-A. OPS CHECK GOOD.