As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN)AIRCRAFT WAS ROLLING FOR TAKEOFF WHEN PILOT OBSERVED A SEVERE NOSE SHIMMY. AIRCRAFT RETURNED TO HANGER. THE NOSE SHIMMY DAMPNER WAS SUSPECTED TO BE AT FAULT AND WAS FOUND TO BE LEAKING. COMPANY POLICYALSO INSPECTS THE ENGINE MOUNT RING AND IN THIS CASE IT WAS FOUND CRACKED. ENGINE MOUNT RING AND SHIMMY DAMPNER WERE REPLACED.