What was found
FLYING OVER MOUNTAINS, ENGINE BEGAN TO RUN ROUGH. DIVERTED, RIGHT MAGNETO CONDENSER FOUND TOTALLY SHORTED. ON RUN UP AFTER MAINTENANCE, LEFT MAGNETO RAN ROUGH, ENGINE NEARLY DIED FROM 1700 RPM. CHANGED OUT LEFT MAGNETO CONDENSER. OPS CHECKED GOOD. (MAG CHECK BEFORE 1.3 HOUR FLIGHT WAS GOOD).