As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TAKEOFF DISCONTINUED AT APPROXIMATELY 20 KNOTS DUE TO TAKEOFF WARNING. TAXIED CLEAR AND ADJUSTED SPEEDBRAKE HANDLE, AFTER WHICH TAKEOFF WARNING DISCONTINUED. MAINTENANCE ADJUSTED SPOILER/SPEEDBRAKE SWITCH S1-143 AND TAKEOFF WARNING SYSTEM CHECKED GOOD PER MM 27-00.