What was found
BNA - FLT 2079 - AFTER TAKEOFF BNA, WHEN LANDING GEAR RETRACTED, LEFT MAIN LANDING GEAR MFDU WARNING DISPLAYED. RECYCLED LANDING GEAR WITH SAME RESULTS. AIRCRAFT RETURNED TO BNA AND LANDED WITHOUT INCIDENT. ADJUSTED LEFT MAIN LANDING GEAR DOOR BUMPER AND INSTALLED LOCK PIN AND SAFETY WIRE. ACCOMPLISHED LANDING GEAR RETRACTON CHECK WITH NO DEFECTS FOUND. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)