As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 819 CLT-GCM - ODOR - STRONG CHEMICAL ACID ODOR REPORTED PRIOR TO LANDING FROM FIRST CLASS THROUGH ROW 19. FLIGHT ATTENDANT REPORTED IT WAS VERY DIFFICULT TO BREATHE. MAINTENANCE FOUND DAMAGED DUCT SLEEVE IN RT PACK BAY. REPLACED SLEEVE.