As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING THE TAKEOFF ROLL ELEVATOR TRIM INDICATOR JUMPED TO THE FULL NOSE DOWN POSITION AND THE TAKEOFF WARNING HORN SOUNDED. ABORTED TAKEOFF. FCECU RESET IAW REFERENCE INSTRUCTION LETTER (RIL) 84-27-004. AIRCRAFT RETURNED TO SERVICE.