As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
JUST PRIOR TO APPROACH, F.A. CALLED TO INFORM US OF FUMES AFTER LANDING. THE NR 2 PACK SHUT DOWN PRODUCING SOME IMPROVEMENT. THE NR 1 PACK SHUTDOWN PRODUCING ADDITIONAL IMPROVEMENT. PERFORMED TSM 05-50-00-810-831-A, THE CAUSE OF THE ODOR WAS THE NR 2 PACK IAW LP 2271796-1. NR 2 PACK CAUSING CABIN ODOR.