As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) RH ENGINE WAS SURGING ON TAKE OFF. PILOT ABORTED TAKE OFF AND MAINTENANCE TROUBLESHOT THE PROBLEM AND FOUND THAT THE MIXTURE SETTING ON THE RH ENGINE WAS EXCESSIVELY RICH. MAINTENANCE SET THE MIXTURE AS PER MAINTENANCE MANUAL AND AIRCRAFT WAS GROUND RUN SATISFACTORILY. THE AIRCRAFT SUBSEQUENTLY CARRIED OUT THE FLIGHT SCHEDULED. (TC# 20190731020)