What was found
FLT 7705 - IAD-BNA - DURING CRUISE, AIRCRAFT MADE AN UNSCHEDULED LANDING DUE TO NAV LIGHT C/B POPPED. AIRCRAFT LANDED AND RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED OPENED DMI 46825, MEL 33-4. MAINTENANCE CLOSED DMI 46825 ON 7/29/99 BY REMOVING AND REPLACING UPPER TAIL NAV LIGHT ASSY. OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)