As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF, THE MASTER CAUTION FIRE LIGHT ILLUMINATED AND THE AURAL WARNING SOUNDED. AIRCRAFT ABORTED TAKEOFF AND RETURNED TO GATE. RESEATED FIRE DETECTOR LOGIC CARDS AND SECOND OFFICER'S MASTER CANCEL SWITCH. OPERATIONAL CHECKS GOOD.