What was found
LEFT NOSE GEAR DOOR REMAINED OPEN AFTER GEAR RETRACTION. RECYCLED GEAR. DUE TO EXCESSIVE VIBRATION, RETURNED TO DAL. CREW REPORTED DOOR CLOSED AT TOUCHDOWN AND DOOR WAS CLOSED UPON ARRIVAL AT GATE. INSPECTED GEAR DOORS, FORWARD DOOR LATCHES, LINKAGE AND FUSELAGE. NO DAMAGE OR DISCREPANCIES FOUND.