As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE SETTING CTOT TO 80 PERCENT POWER AUTOCOARSEN ARMED LIGHT WENT FROM HIGH TO LOW WITH A POWER FLUCTUATION. FLIGHT CREW REDUCED POWER AND ABORTED TAKEOFF. MAINTENANCE FOUND MANUAL ENGINE RIGGING TO BE INTERFERING WITH AUTOCOARSEN ELECTRICAL SETTINGS. ENGINE MANUAL RIGGING WAS CORRECTED AND AIRCRAFT RETURNED TO SERVICE.