As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW CREW REPORTED PRIMARY & ALTERNATE STAB TRIM FAILED IN FLIGHT. FLIGHT RETURNED DFW LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED HORIZONTAL STABILIZER TRIM DOWN TRIM RELAY R2015. SYS GND CHECKED NORMAL OPERATION CLOSED.