As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CONTROL CHECK EXPERIENCED A HYD BUMP WHEN RELEASING AFT AND FULL FWD ELEVATOR. BUMP IN CONTROL COLUMNS IS FELT AFTER RELEASING COLUMN FROM FULL NOSE UP OR FULL NOSE DOWN POSITION. ACP'D CK AND INSPECTED PULLYS AND CABLES NO IRREG FOUND. POSSIBLY BUMP FROM SNUBBING RING.