As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED THAT DURING TAKEOFF ROLL AT APPROXIMATELY 98KTS, THE MASTER WARNING LIGHT ILLUMINATED MOMENTARILY. ABORTED THE TAKEOFF. PERFORMED RTS OF DEU 1, DEU 2, AND DEU 3. RTS PASS IAW MM 31-61-02. OPS TEST OF MASTER WARNING ILLUMINATED PUSH BUTTON SWITCH. NO DISCREPANCIES NOTED.