What was found
FLIGHT 715 SFB/LAN - THE FLIGHT CREW REPORTED; DURING TAKEOFF ROLL "F/S FAIL" INTERMITTENTLY APPEARED ON BOTH PRIMARY FLIGHT DISPLAYS. REJECTED TAKEOFF AT 100 KTS. UPON CLEARING THE RUNWAY THE SYSTEM INDICATION RETURNED TO NORMAL. SFB MAINTENANCE REPORT THAT DFGC NR 2 FAILED A RETURN-TO-SERVICE TEST. THEY PERFORMED A LOGIC RESET ON DFGC NR 2 AND THE SYSTEM PASSED THE RETURN-TO-SERVICE TEST. THE AIRPLANE HAS RETURNED TO SERVICE.