As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CID - FLT 3954 - AFTER TAKEOFF, THE CAPTAIN AND FIRST OFFICERS YOKE TRIM SWITCHES FAILED. MAINTENANCE REMOVED AND REPLACED HORIZONTAL STABILIZER ELECTRONIC CONTROL UNIT. AIRCRAFT PASSED A FUNCTIONAL CHECK FLIGHT AND WAS RETURNED TO SERVICE. (M)