As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, CREW REPORTED AN ACRID "MEDICINE" ODOR FROM ROW 8. ODOR DISSAPATED WITHIN FIVE MINUTES. NO ODOR IN COCKPIT. ODOR HAPPENED AGAIN ON DESCENT, ONLY STRONGER THAN BEFORE. MAINTENANCE ACCOMPLISHED JC 26L0021001. TROUBLESHOT CABIN AIR QUALITY. FOUND RECIRCULATION FAN RUNNING LOUD AND ROUGH. REPLACED RECIRCULATION FAN IAW 21-21-51-401-000.