As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIC - FLT 3669 - CREW REPORTED ''RIGHT AFTER V1 ON GROUND ON TAKEOFF, RECEIVED MASTER WARNING (NO EICAS MESSAGES) PITCH TRIM HAD RUN FROM 7 UNITS UP TO 2 UNITS UP WITHIN 2 SECONDS. AIRCRAFT COULD NOT BE TRIMMED AGAIN UNTIL APPROXIMATELY 500 FEET, 160 KNOTS. NO OTHER IRREGULARITIES NOTED. MAINTENANCE IN RIC, REPORTED OPS CHECKED GOOD IAW EMB145 MM 27-40-00. (M)