What was found
IAD - FLT 3015 - THE CREW REPORTED THAT ON TAKEOFF ROLL, THE 'AFX DISABLE' ANNUNCIATOR ILLUMINATED AT 90 KIAS, THE AIRCRAFT ABORTED TAKEOFF AND RETURNED TO THE GATE WITHOUT FURTHER INCIDENT. MAINTEANCE REMOVED AND REPLACED PCBA123 AND PERFORMED OPS CHECKS AND ENGINE RUNS IAW BEECHCRAFT MM 61-21-00, NO DEFECTS WERE NOTED. THE AIRCRAFT WAS RELEASED TO SERVICE. (X)