What was found
(( MZ2R)) AFTER NORMAL RUN-UP, THE ACFT PROCEEDED TO TAKEOFF, ON ROLLOUT SMOKE WAS NOTED. THE PILOT WAS COMMITTED TO TAKEOFF, THE ENGINE WAS STILL GENERATING POWER AT THAT TIME, THE ENGINE/PROPELLER WERE SHUTDOWN/ FEATHERED. A NORMAL LANDING OCCURRED. AFTER UNCOWLING THE LT ENGINE, A HOLE WAS NOTED ABOVE NR 4 CYLINDER IN THE ENGINE CASE. NR 4 PISTON CONNECTING ROD WAS NOTED BROKEN IN HALF. THE ENGINE HAS NOT BEEN REMOVED FROM THE ACFT AS OF YET FOR FURTHER INVESTIGATION.