As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONT. ODOR APPARENT ON FLT DECK W PACKS OFF RE CIRC FANS ON LOWER RECIRCULATION FAN MSG WITH MAINT MSG 21-24600. FOLLOWED FIM TASK 21-25 TASK 807. REMOVED AND REPLACED LOWER LEFT RECIRC FAN REF 21-25-07-400-801 AND LOWER LEFT RECIRC FAN VIBRATION MONITOR REF AMM 21-25-07-400-803 AS PRECAUTIONARY. OPS CHECK MONITOR, VIBRAT OFF 25-2125-9-9002 3062 ON 25-2125-9-9002 3284 GOOD, MSG CLEARED.