As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMBOUT OF MEM, THE FO'S PITCH TRIM ON YOKE WOULD NOT WORK. ALL CIRCUIT BREAKERS WERE IN AND BOTH SIDES WERE BEING MOVED. CAPT SIDE WORKED NORMAL. STARTED TO WORK ON APPROACH. AIR RETURN TO MEM. MAINTENANCE REMOVED AND REPLACED RELAYS 15CC & 17CC. PN FOR BOTH M83536-2-024M. TESTED MAIN AND STANDBY TRIM-ALL TESTS ARE GOOD.