As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ELEVATOR TRIM STICKING INSPECTED AND FOUND ELEVATOR TRIM ACTUATOR TO BE AT FAULT. GROOVE PIN LOOSE IN ACTUATOR SPROCKET ASSY PIN HOOKING IN GUIDE BLOCK. ACTUATOR ASSY REPLACED. CURRENTLY INSPECTING THE REST OF THE FLEET 152/172'S FOR LOOSE GROOVE PINS IN SPROCKET OF ACTUATOR.