As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT APPROX 65-70 KIAS ON TAKEOFF ROLL FOR OCF. HP DUCT OVERPRESSURE R EICAS MESSAGE ILLUMINATED .TAKEOFF ABORTED. - REMOVED AND REPLACED SWITCH DUE TO FAILED OPERATION. SYSTEM OPERATIONALLY CHECKS GOOD. ALL WORK DONE IAW CE 750 MM CHP 36-11-00.