As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPTAIN REPORTED THAT DURING LEFT ENGINE STARTING AND SHUT OFF, VIBRATION WAS FELT IN THE HOLE AIRCRAFT. THE LEFT ENGINE VIBRATION ABSORBERS, BARS AND ACCESSORIES WERE INSPECTED, BEING ALL CORRECT. THE LEFT ENGINE WAS STARTED DETECTING VIBRATION. THE UVC WAS DECOUPLED AND THE LEFT ENGINE WAS STARTED CONTINUING THE FAILURE. AIRCRAFT WAS SENT TO THE HANGAR AND THE LEFT ENGINE WAS REPLACED AND TESTED IAW MM 71-00-02 MM 24-20-00 RESPECTIVELY, ALL CORRECT.