What was found
MAGNETO CHECK PRIOR TO TAKEOFF. ENGINE WOULD NOT RUN ON RT MAGNETO. INSPECTION OF MAGNETO FOUND 4 TEETH MISSING, RT SIDE DISTRIBUTOR GEAR ASSY. ALL TEETH ON RT AND LT GEAR ASSYS BADLY WORN AND CHIPPED. SUSPECT CAUSE, AGE, HEAT, AND LACK OF LUB ON DRIVE GEAR. CLOSER INSPECTION OF MAG GEARS ON INSPECTION.