As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#1733, DCA-PBI. 'CABIN CREW REPORTED UNUSUAL OREGANO ODOR IN AFT CABIN STARTING AT ROW 24; C/W INFO NOTICE 2017-T015K PERFORMED TSM TASK 05-50-80-810-831-A. FOUND NO OIL IN APU COMPARTMENT PERFORMED DECONTAMINATION OF PACK 1 & PACK 2 NO ODOR PRESNET. REPLACED HEPA FILTERS W/REF TO A320 AMM 22-21-41. A/C OK FOR SVC. NO FURTHER DEFECTS NOTED.'