What was found
MIA/NAS - FLT 429 - PILOT REPORT: SHORTLY AFTER TAKEOFF, EXPERIENCED EXTREME DIFFICULTY CONTROLLING THE ACFT PITCH ATTITUDE. CREW DECLARED AN EMERGENCY, RETURNED TO MIA AND LANDED SAFELY WITHOUT FURTHER INCIDENT. MAINTENANCE INSPECTED CONTROL COLUMN, DETERMINED A BOLT TO BE INSTALLED IN THE GUST LOCK. REMOVED BOLT, INSPECTED CONTROL COLUMN FOR DAMAGE AND FREEDOM OF MOVEMENT. NO DEFECTS NOTED. AIRCRAFT RELEASED.