What was found
DURING CRUISE PILOT SENSED A "POP" ENGINE BEGAN RUNNING ROUGH WITH POWER LOSS. DECLARED EMERGENCY, DIVERTED, LANDED WITHOUT INCIDENT. INVESTIGATION FINDS #2 CYLINDER CRACK ACROSS TOP SPARK PLUG HOLE. CYLINDER ENGINE COMPONENTS INC. (ECI) PART NUMBER CCST4.1 AEL65102-4.1, SERIAL/BATCH NUMBER 73972-08H (01) INSTALLED JANUARY 2000. TIME IN SERVICE 1171 HOURS