What was found
FLT 6418 - CLE-IAD - DURING CRUISE, MADE AN UNSCHEDULED LANDING DUE TO PASSENGER DOOR WARNING LIGHT ILLUMINATED. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND OPENED DMI 43219 MEL 52-2. MAINTENANCE CLOSED DMI 43219 ON 1-10-99 BY CLEANING AND LUBING PASSENGER DOOR MICROSWITCHES OPS CHECK OK. AIRCRAFT WAS APPROVED AND RELEASED AND RETURNED TO SERVICE. (M)