What was found
SOLO FLIGHT FOR PRIVATE LICENSE, DEPARTED, 13 MILES OUT THOUGHT HE HAD A PROPELLER FLUCTUATE. CLIMB TO 4,000 FT IN 3 MILES GOING TO DESTINATION. CHECK EVERYTHING AND ALL LOOKED NORMAL. 8 MILES OUT SAW PROPELLER FLUCTUATE AGAIN, LOOKED AT OIL PRESSURE INDICATOR AND WAS READING ZERO. 1.5 MILES, ON APPROACH AROUND 400-700 FT GOT A FIRE BALL, POP AND ENGINE STOPPED AT 200 FT. GLIDED INTO DESTINATION WITHOUT ANY OTHER ISSUES. MOVED ACFT TO MAINTENANCE TO FIND OUT CAUSE. FOUND .1250" CRACK AROUND .7500 OF ENGINE CASE. CAUSE OF CRACK IN CASE UNKNOWN. AIRCRAFT AIRFRAME, ENGINE AND PROPELLER BOOKS WITH CUSTOMER, REQUESTED BY INSPECTION.