What was found
FLT 1503, BDL-RSW. PASSING 2500 A ODOR (DIRTY SOCK) SMELL BECAME APPARENT, LEVEL 1. DISSIPATED AFTER A FEW MINUTES. CABIN CREW AND PAX MENTIONED IT ON LANDING IT WAS APPARENT IN CABIN AS WELL. APU WAS NOT RUNNING, COMPLIED WITH INFORMATION NOTICE 2017-T015F SECTION A. AIRCRAFT OK FOR SERVICE.