What was found
(CAN) DURING TAKEOFF, THE PILOT HEARD A BANG FROM THE ENGINE COMPARTMENT FOLLOWED BY AN ENGINE VIBRATION. THE PILOT ABORTED THE TAKE OFF AND TAXIED BACK TO THE FLOAT PLANE DOCK FOR INVESTIGATION. DURING INSPECTION, MAINTENANCE PERSONNEL FOUND NR 9 CYLINDER HEAD SEPERATED FROM THE CYLINDER. NR 9 CYLINDER, PN 399354, SN E7255-4837. REMOVED WITH 94.1 HRS TSO, CYLINDER ASSY PN SAME, SN 42333-1 INSTALLED WITH TSO 0.0 HRS. ALL WORK WAS CARRIED OUT IAW MM SECT 8-28. GROUND RUN AND LEAK CHECK CARRIED OUT, DEFECT RECTIFIED.