As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STAB TRIM RUNAWAY NOSE DOWN JUST AFTER TAKEOFF. PREFORMED QRC, THEN QRH. LANDED FLAPS 20. (FLIGHT 6262) B1-007955 THIS DISCREPANCY WAS TRANSFERRED TO CAMP ITEM 31555299 WITH THE FOLLOWING CORRECTIVE ACTION: REFER TO CP 31556697 FOR CORRECTIVE ACTION OF FIRST OFFICER PITCH TRIM SWITCH REPLACEMENT & OPS CHECKS OF THE STAB TRIM SYSTEM. REFER TO CP 31556708 FOR TROUBLESHOOTING."