As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REPLACED WORN POINTS IN MAGNETO. ON RUN UP FOUND 500 RPM DROP. REMOVED MAGNETO AND FOUND DISTRIBUTOR BLOCK CONTACT TOWERS AND DISTRIBUTOR FINGER OIL SOAKED FROM EXCESS LUBRICANT. WHILE INSPECTING FOUND DISTRIBUTOR GEAR BUSHING LOOSE IN DISTRIBUTOR BLOCK. OVERHAUL SHOULD FOLLOW MANUAL.