What was found
FLT#1252, RSW-HPN. 'DURING DESCENT & APPROACH MILD TO MODERATE SMELLY SOCK ODOR FUME EVIDENT IN MID CABIN, MILD OROD IN COCKPIT. PACK 1 SELECTED OFF SEEMED TO HELP BUT NOT ELIMINATE IT; PERFORMED INFO NOTICE 2017-T015J SECTION B2, DECONTAMINATION LVL 2 WAS ACCOMPLISHED PER TSM 05-50-00-810-831-0-A, REPLACED ALL HEPA FILTER IAW AMM 21-21-41 AND 21-51-41. NO ODORS ARE PRESENT. A/C IS OK FOR SERVICE.