NMAC BTWN AN MD88 ON FINAL APCH AND A CESSNA CITATION JET OVERSHOOTING THE FINAL APCH ON A PARALLEL RWY.

Narrative

MY FO WAS AT THE CTLS. WX CONDITIONS WERE EXCELLENT. BOTH MY FO AND I WERE ON RWY 18R LOC FREQ; ON BASE LEG; WHEN APCH CTL CLRED US FOR A R TURN AND A VISUAL APCH TO RWY 18R. WE CAPTURED RWY 18R LOC BTWN 'TOMME' AND THE FINAL APCH FIX 'SOPHE;' AND FO MAINTAINED IT AS WELL AS GS FOR THE ENTIRE APCH. PRIOR TO SOPHE; THE ACFT WAS CONFIGURED FOR LNDG AND THE BEFORE LNDG CHKLIST WAS COMPLETED BY MYSELF. I CONTACTED 'TWR' PRIOR TO SOPHE; AND TWR CLRED US TO LAND RWY 18R AND GAVE WINDS FROM THE SE; AT I BELIEVE 5 KTS. AT 1000 FT AGL; I GAVE THE '1000 FT ABOVE' CALLOUT. AT APPROX 2 MI OUT/700 FT AGL/1400 FT MSL; I NOTICED OUT OF THE CORNER OF MY EYE; AN ACFT; IN A STEEP L BANK (AT LEAST 45 DEGS) AT OUR ALT; GOING AWAY FROM US; AND ITS LNDG GEAR NOT EXTENDED. AT THE TIME WE WERE ON RWY 18R LOC AT 134 KTS; AND AT 700 FT AGL. I IMMEDIATELY TOLD MY FO OF THE ACFT. A COUPLE SECONDS LATER TWR CALLED OUT THE TFC TO US; AS AN 'OVERSHOOT' TO RWY 18L. I DIDN'T INITIATE EVASIVE ACTION BECAUSE THE ACFT WAS GOING AWAY FROM US. IT WAS ALSO GOING FASTER THAN US AS WELL. WHEN I FIRST SAW THE ACFT IT WAS AT OUR ALT AND 200 FT FROM US. I DON'T KNOW HOW CLOSE IT ACTUALLY GOT; BEFORE I SAW IT. THE ACFT WAS WELL BEYOND THE CTR POINT OF BOTH FINAL APCH PATHS FOR RWYS 18L AND 18R. IT WAS ACTUALLY CLOSER TO 'OUR' RWY 18R; THAN 'HIS' RWY 18L. NUMEROUS PAX EXPRESSED THEIR CONCERN OF WHAT HAPPENED. A NEAR MISS RPT WAS FILED WITH FAA AREA SUPVR. THE OTHER ACFT WAS A CESSNA CITATION; OPERATED BY FBO. ALSO; OUR TCASII SYS WAS INOP; THE TCASII CIRCUIT BREAKER WAS PULLED AND COLLARED.