As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON GROUND EVENT DURING OVERSPEED GOVERNOR CHECK PRIOR TO T/O, THE PILOT HEARD A LOUD NOISE AND SAW MATERIAL COMING OUT OF THE EXHAUST. THE ENGINE WAS SHUT DOWN. POST EVENT INSPECTION FOUND PUNCTURE DAMAGE FROM DEBRIS ON THE WINGS. THE ENGINE WILL BE SENT FOR INVESTIGATION .