What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT DIVERTED TO BNA. AFTER TAKEOFF THE AFT FLIGHT ATTENDANTS REPORTED A SWEET MAPLE SYRUP ODOR IN THE LAST THIRD OF THE AIRCRAFT. THE FLIGHT ATTENDANTS REPORTED THAT THE ODOR DECREASED MIDWAY THROUGH THE FIGHT BUT CAME BACK AND WAS GETTING STRONGER. THE ODOR WAS MOST PROMINENT FROM ROW 21 TO THE AFT OF THE CABIN. THE CREW DEPLOYED THE PASSENGER CABIN OXYGEN MASKS AND DOONED THEIR OXYGEN MASKS. THE AIRCRAFT LANDED SAFELY AT BNA AND THE PASSENGERS WERE DEPLANNED ON THE TAXIWAY AND BUSED TO THE TERMINAL. **SUPPLEMENTAL REPORT FOR AALA202306095123: MAINTENANCE ACCOMPLISHED THE SMOKE ODOR FUME TROUBLESHOOTING TASK CARD 26L00021001 AND COULD NOT DUPLICATE THE ODOR. NO DEFECTIVE COMPONENT WAS IDENTIFIED BY MAINTENANCE.** (CLOSED)