As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING A FLIGHT TEST OF THIS AIRCRAFT AND DURING DESCENT THE ENGINE VIBRTION (NH) HAS GONE ABOVE LIMIT. ENGINE HAS BEEN REMOVED SENT TO RRC FOR BORESCOPIC INSPECTION. BORESCOPE INSPECTION REVEALED ONE OFF STAGE 1 BLADE BROKEN OFF AT APPROXIMATELY MID SPAN. RRC REPORTED FINDINGS TO THE OEM WHO THEN REQUESTED THE ENGINE TO BE SENT BACK TO GERMANY FOR INVESTIGATION.