As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REJECTED TAKEOFF DUE TO FWD EQUIPMENT OVERHEAT LIGHT ON EICAS AT 80 KNOTS, WITH AUDIBLE ALARM. PERFORMED FIM TASK 21-58 FAULT TREE 996. FOUND FLT DECK SUP FLOW MSG. DUE TO ICING IN THE LEFT PACK. REPLACED MIX MANIFOLD SENSOR (TS200) IAW AMM 21-61-02/401.