As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ELECTRICAL ODOR IN 1ST CLASS AND FLT DECK. REPORT FROM UAL OSV INDICATES FAILURE OF THE FRONT BEARING P/N 5902975. REFERENCE CMM 21-58-02 FIG 1 - ITEM 300. THE BEARING WAS FOUND SEIZED AND BROKEN IN PARTS. THIS IS A KNOWN FAILURE MODE WHERE THE STATOR STACKS AND THE FAN'S ROTOR COME INTO CONTACT CREATING A BURNED ODOR AND/OR SMOKE.