As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING SCHEDULED BRUSH, CHANGE THE REPAIR THE TECH NOTED NOISE FROM THE BEARINGS. INSP REVEALED THE ARMATURE, 1 OF THE (COMMUTATOR END) BEARINGS HAD FAILED. A VISUAL INSP OF THE BEARING REVEALED THE GREASE HAD SEEPED PAST THE SEALED AREA AND THE BEARING WOULD NOT SPIN FREELY BY HAND. BOTH BEARINGS WERE R & R NO OTHER DISCREPANCIES NOTED.