What was found
FLT 6312 - IAD-JFK - DURING CRUISE, MADE A UNSCHEDULED LANDING DUE TO PASSENGER DOOR WARNING LIGHT ILLUMINATED. AIRCRAFT RETURNED TO IAD AND GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND OPENDED DMI 04203, MEL 52-2. MAINTENACNE CLOSED DMI 04203 ON 1-19-97 BY LUBING DOOR MEHANISM, OPS CHECK OK. AIRCRAFT WAS RELEASED AND RETURNED TO SERVICE. (M)