What was found
FLT 813, HPN- PBI. AFTER PARKING AT THE GATE THE F3 ADVISED ME OF A VINEGAR SCENT ON FINAL APPROACH. NO MEDICAL ATTENTION REQUIRED, DEICED IN HPN. ADVISED THE SCENT WAS DIFFERENT, THIS WAS ONLY EXPERIENCED BY F3 & F4. REF INFO NOTICE 2017-T015M, FOUND SOURCE OF ODOR TO BE THE APU, DUE TO HEAVY GLYCOL DEICING FLUID CONTAMINATION. APU PLACED ON MEL PERFORMED LEVEL A DECONTAMINATION IAW MM 21-00-00-615-802A, NO ODOR PRESENT. ACFT OK FOR SERVICE.