As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKEOFF ROLL AT CLT, PILOT NOTICED LEFT ENGINE NOT PRODUCING FULL POWER. PILOT ABORTED TAKEOFF AND TAXIED BACK TO RAMP WITHOUT INCIDENT. MAINTENANCE REPLACED DEFECTIVE LEFT MAGNETO, RUN UP AND OPERATIONAL CHECK OK NO FURTHER DEFECTS NOTED.