As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RTO - DUE TO T/O WARNING HORN SOUNDING AT 1.4 EPR, AIRSPEED WAS ZERO, TRIM WAS IN GREEN ARC, FLAPS SET TO 15 DEGREES, AND SPEEDBRAKE STOWED. REMOVED AND REPLACED UPPER STAB WARNING SWITCH IAW 727 M/M CHAPTER 31-26-24. OPS CHECKED GOOD.