As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED DURING CLIMB OUT STAB TRIM ELEC CONTROLS ON BOTH THE CAPTAIN & FIRST OFFICER`S YOKE INOPERATIVE. EMER DECLARED FLIGHT RETURNED & LANDED WITHOUT INCIDENT. ACFT REMOVED FROM SERVICE. REPLACED R20-17 BRAKE RELAY DOWN TRIM. SYS GND CHECKED NORMAL OPERATION CLOSED.