As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON SETTING THROTTLES FOR TAKE OFF, (NO TAKEOFF) WARNING CAME ON. THE WARNING WAS GENERATED FROM A (ROLL SYSTEM) FAULT. SHUT OFF ALL ELECTRICAL POWER TO SEE IF MESSAGE WOULD CLEAR, BUT THE FAULT COMES BACK WHEN RT AILERON IS PUT IN (CONTROL YOKE MOVED RT). REMOVED AND REPLACED AILERON ROLL RATIO CHANGER PROXIMITY SWITCH IAW MM CHAPTER 20-10-06. OPS CHECK GOOD.