As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HANGER ASSY HAS HIGH FREQUENCY VIBRATION. COUPLING AND BEARING HANGER WERE PAINTED WITH PRIMER. NO DEFECTS NOTED FOR VIBRATION. DISASSEMBLED, STRIPPED PRIMER FROM COUPLINGS, CLEANED & VISUALLY INSPECTED ALL PARTS. HAD COUPLING CAD PLATING TOUCHED UP. REASSEMBLED IAW 412 CR&O INSTALLING NEW SEAL & ALL SERVICEABLE PARTS. PURGED BEARING WITH MOBIL 28 GREASE & REPACKED FLEX COUPLING WITH GREASE DATED 9-20-01.