What was found
ACFT HAD INTERMITTENT MAGNETO OPERATION ON LT MAGNETO POSITION DURING GROUND RUN-UP PROCEDURE. ACFT MX WAS ABLE TO DUPLICATE PROBLEM. REMOVED LT MAGNETO FOR INTERNAL INSPECTION. ROTOR (NR 16) WAS UNSEATED FROM ROTOR SHAFT CAUSING LIP ON ROTOR GEAR TO GROUND-UP BY DISTRIBUTOR BLOCK GEAR. THE LIP MATERIAL WAS FOUND THROUGHOUT THE INSIDE OF MAGNETO HOUSING. ACFT MX REMOVED RT MAGNETO FOR VISUAL INSP AND FOUND THE SAME DAMAGE AS THE LT MAGNETO. BOTH MAGNETOS HAD FACTORY TORQUE SEAL APPLIED TO TOP COVER SCREW. (K)