What was found
FLT 7405 - IAD-CLE - DURING CRUISE, AIRCRAFT MADE AN UNSCHEDULED LANDING DUE TO PASSENGER DOOR WARNING LIGHT ILLUMINATED. AIRCRAFT RETURNED TO THE GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND OPENED DMI 44089, MEL 52-2. MAINTENANCE CLOSED DMI 44089 ON 5/03/98 BY REMOVING AND REPLACING PASSENGER DOOR MICROSWITCH, OPS CHECK OK. AIRCRAFT WAS RELEASED AND RETURNED TO SERVICE. (M)