As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HIGH VIBRATION DURING TAKEOFF AND CLIMB AND GETTING WORSE WHILE INCREASING SPEED IN THE LOWER NOSE. CORRECTIVE ACTION:HAS BEEN CHANGED ROD ASSEMBLY IAW TASK 32-22-11-004-031, TASK 32-33-61-705-001 AND TASK 32-33-00-735-005. HAS BEEN CHANGED NLG LOCK ACTUATOR 32-33-21-004-005