As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHORTLY AFTER TAKEOFF, PLANE STARTED TO SHUDDER VIOLENTLY. PILOT THOUGHT PROPELLER TIP BROKE. AN IMMEDIATE EMRGENCY LANDING WAS MADE ON AN INTERSECTING RUNWAY. UPON INSPECTION, LEFT TRIM TAB HORN FOUND BROKEN AND TRIM WIRE LOOSE PART BROKE MIDWAY BETWEEN RVET AND BOLT HOLE.