B757-200
Other / Unknown
Aircraft Equipment Problem Critical
Flight Crew Landed in Emergency Condition
Aircraft
Descending out of 3;800 FT (MSL and AGL) during the ILS to Runway XX;  we received a gear unsafe ICAS warning; red lights; siren; RA flags and lost the Captain's FD.  We extended the landing gear and the warnings went away and we made an uneventful landing.  The Captain notified the tower prior to landing that we had an issue and requested the sterile area remain clear.
Air Carrier experienced a number of equipment failures and notified ATC of a request to keep the area sterile; the event handled as an emergency with all participants handling the event as required.