As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SOMETHING INSIDE CYLINDER LET GO SO THAT THE ROD WAS NO LONGER CONNECTED TO THE PISTON. BOTTOM OF THE PISTON WAS DESTROYED. WRIST PIN RIDES WAS DESTROYED FROM BANGING INTO BOTTOM OF CYLINDER. EITHER THE PISTON LET GO, OR THE ROD LET GO OF THE WRIST PIN.