What was found
MAIN CARGO DOOR LIGHT CAME ON INFLIGHT. SINGLE LIGHT SYSTEM RETURNED TO MIA, WITHOUT FURTHER INCIDENT. T/S SYST OF MAIN CARGO DOOR, FOUND WIRE AT CONTROL PANEL TO INDICATOR SYST LOOSE, SECURED SAME. OPS CKD SEVERAL TIMES, OPS NORMAL IAW AERONAUTICAL ENGINEERS M/M PG 55-3-03.