As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING MAINTENANCE THE #2 ENGINE WAS DISCOVERED TO HAVE IMPELLER DAMAGE. AFTER A BOROSCOPE WAS CARRIED OUT FURTHER DAMAGE WAS FOUND ON THE DIFFUSER CHANNELS AND ENGINE CASING. AFTER CONSULTING WITH THE ENGINE MANUFACTURER, IT WAS DETERMINED THAT THE DAMAGE WAS OUT OF LIMITS AND THE ENGINE TO BE CHANGED.