As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED A NORMAL RUN-UP BEFORE TAKEOFF. DURING CLIMB-OUT POWER LOSS WAS EXPERIENCED. ON LANDING ANOTHER RUN UP SHOWED THE RT MAGNETO WAS INOPERATIVE. REMOVED THE RT MAGNETO AND FOUND THE PLASTIC DISTRIBUTOR GEAR WAS MISSING TEETH .2500 OF THE WAY AROUND THE GEAR.