What was found
AIRCRAFT WAS GROUNDED: SIGNIFICANT AIRFRAME VIBRATION ABOVE 300KTS / .78M. FL250-280 IN CLIMB. ENGINE VIBRATION WAS NORMAL. WHEN F/CTL WAS CALLED UPTHE RUDDER TRAVEL LIMIT WAS AMBER VERY BRIEFLY. (OPEN)
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIRCRAFT WAS GROUNDED: SIGNIFICANT AIRFRAME VIBRATION ABOVE 300KTS / .78M. FL250-280 IN CLIMB. ENGINE VIBRATION WAS NORMAL. WHEN F/CTL WAS CALLED UPTHE RUDDER TRAVEL LIMIT WAS AMBER VERY BRIEFLY. (OPEN)