As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING T/O ROLL WITH POWER LEVERS IN T/O FOR APPROXIMATLEY 10-15 SECONDS AND AT APPROXIMATELY 40KNTS (NO TAKE OFF) CONFIG WARNING ACTIVATED REASON FOR WARNING CANNOT BE DETERMINED, CONFIGURATION WAS NORMAL FOR ALL SYSTEMS.- ITEM IS UNDER INVESTIGATION.