As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 206, BNA-BOS. LEVEL 1 ODOR EVENT SEE CABIN ODOR FOR DETAILS; TROUBLE SHOT PER TSM 71-00-00-810-801-A, FOUND DE-OILER CARBON SEAL LEAKING. R & R DE-OILER CARBON SEAL REF AMM 72-61-49. LEAK CHECK GOOD. COULD NOT SMELL ANYTHING IN COCKPIT OR CABIN. A/C OK FOR SERVI.CE.COMPLIED WITH INFO NOTICE 21017-T036R