As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#257, BOS-BZN. APU OILY ODOR / DIRTY SOCKS AFTER GATE ARRIVAL MILD ODOR IN FLIGHT DECK STRONG ODOR IN AFT CABIN IN GALLEY; COMPLIED WITH INFO NOTICE 2017-T015L SECTION B ISOLATED FAULT TO TYEP 1 EVIDENCE OF OIL LEAK IN APU INLET AREA PER TSM 05-50-00-810-085-B APU PLACED ON MEL REF LP 4255102 MDDR# 590973 FOR PRECAUTIUONAY R/R BOTH HEPA FILTERS A/C IS OK TO CONT SVC PACK ECS DECONTAMINATION ALSO PERFORMED.