What was found
VIBRATION IN CABIN LASTING 50 SECONDS, 300 KNOTS INDICATED AIRSPEED AND CENTER AUTOPILOT ENGAGED.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
VIBRATION IN CABIN LASTING 50 SECONDS, 300 KNOTS INDICATED AIRSPEED AND CENTER AUTOPILOT ENGAGED.