As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#2613, ATL-LGA. 'DIRTY SOCK SMELL THROUGHOUT THE AIRCRAFT; COMPLIED WIITH INFO NOTICE 2017-T015J SECTION B2 DECONTAMINATION LEVEL B WAS ACCOMPLISHED PER AMM 25-00-00-615-803A VERIFIED SOURCE OF ODOR TO BE APU. FOUND OIL TRACES IN APU COMPARTMENT APU PLACED ON MEL 49-10-01A C/W MX PROCEDURE. MX-4 UPDATED. PLACARD INSTALLED OK FOR MX MDDR 19760.'