As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE PISTON WAS FORCED OUT OF THE END OF THE SLIDE TUBE, SHEARING 2 GRUB SCREWS AND DAMAGING 2 OTHER GRUB SCREWS AND CRACKING THE SLIDE TUBE. THE SLIDE TUBE AND PISTON ARE NOT REPAIRABLE. CIRCUMSTANCES UNDER WHICH IT OCCURRED, UNKNOWN. PROBABLE CAUSE, UNKNOWN.