What was found
(CAN) LT MAGNETO FAILED ON THE RUN-UP CHECK, MAGNETO WAS REMOVED FOR INSPECTION. INSPECTION REVEALED THAT THE DISTRIBUTOR BLOCK WAS CRACKED IN THE AREA OF THE OIL FELT PAD AND THE BUSHING WAS LOOSE ENOUGH TO ALLOW THE DISTRIBUTOR WHEEL TO BECOME DISENGAGED FROM THE ROTOR GEAR. SERVICABLE DISTRIBUTOR BLOCK AND WHEEL WERE INSTALLED, MAGNETO RE-INSTALLED ON THE ENGINE AND RUN-UP WAS SATISFACTORY. THE MAGNETO HAD 243.5 HRS TTSN.