As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKEOFF AT SFO EN ROUTE FOR LAS TAKEOFF CONFIGURATION WARNING HORN SOUNDED, REJECTED TAKEOFF. TAXIED OFF RUNWAY, RESET TAKEOFF SETTINGS, DEPARTED WITHOUT FURTHER DIFFICULTY. DUE TO ANOTHER RECENT REJECTED TAKEOFF ON THIS AIRCRAFT FOR TAKEOFF CONFIGURATION WARNING A FOLLOW-UP HAS BEEN WRITTEN TO PERFORM A TAKEOFF WARNING SYSTEM TEST PER T/C A1B31009. MAINTENANCE PERFORMED TAKEOFF WARNING TEST PER AWA T/C A1B31009, NO DEFECTS WERE NOTED. PROBLEM RETURNED; SEE SDR AWXA200400879 FOR CORRECTIVE ACTION.