SF34 FLC OVERSHOOTS FINAL WHILE DISTRACTED BY OTHER ACFT ON PARALLEL APCHS TO LAX.

Narrative

ACFT (SF340B) WAS IN THE BASE TURN DURING TRANSITION FROM VECTORS TO A VISUAL APCH; FOLLOWING ANOTHER ACFT (MD80) FOR A VISUAL APCH TO RWY 24R AT LAX. PF WAS FO ON R SIDE OF ACFT MAKING R TURNS TO BASE AND TO FINAL. DURING BASE TO FINAL; I LOWERED THE GEAR AND COMPLETED THE ASSOCIATED FLOW ITEMS. I WAS ABOUT TO SUGGEST TO THE FO TO TURN INSIDE THE LOC FINAL APCH COURSE (N OF COURSE) TO AVOID WAKE TURB WHEN WE NOTED THAT WE WERE A DOT HIGH ON THE GS AND WE WOULD BE ABOVE THE WAKE TURB. I FELT THAT THIS WOULD SAFELY AVOID THE TURB AND DIDN'T FEEL A NEED TO COMMENT ON MY IDEA. AS WE STARTED OUR TURN TO FINAL; I SAW AN ACFT XING THE HARBOR FREEWAY; THAT I THOUGHT WAS THE TFC WE WERE TO FOLLOW (BUT TURNED OUT TO BE A DC9 INBOUND FOR RWY 25) AND ESTIMATED THAT WE WERE ABOUT 3 MI IN TRAIL AND ABOVE THE GS. THE ARPT WAS ABOUT 13 MI FROM OUR POS. AS WE STARTED OUR R TURN TO FINAL; I CHKED TO MY L AND SAW A B767 ABOUT 2 MI AWAY AND ON WHAT SEEMED TO BE A CONVERGING COURSE AND AT THE SAME ALT. I ADVISED THE FO TO TIGHTEN UP THE R TURN; CONTINUING NORTHWESTWARD AND TO CLB TO AVOID THE TFC. AS I WAS SAYING THIS; WE BOTH REALIZED THAT WE WERE S OF THE RWY 24R LOC. AS WE CORRECTED N; I ADVISED APCH THAT WE WERE CORRECTING N. THE FO NOTED THAT THE AUTOPLT HAD NOT CAPTURED THE FINAL APCH AS IT WAS SET UP TO DO. WE CORRECTED TO THE RWY 24R LOC AND LANDED AT LAX. A MAJOR CONTRIBUTING FACTOR THAT WOULD HAVE PREVENTED THIS EVENT WAS THAT WE DID NOT HAVE A WORKING TCASII SYS. IT HAD BEEN PREVIOUSLY DEFERRED. HAD THIS SYS BEEN WORKING; IT WOULD HAVE ALLOWED ME TO REALIZE THAT THERE WERE 2 ACFT ON FINALS AHEAD OF US (ONE FOR THE S COMPLEX AND ONE FOR THE N COMPLEX). IT WOULD HAVE REDUCED MY CONCERNS OF WAKE TURB. PLUS I WOULD HAVE 'SEEN' THE B767 EARLIER IN THE APCH ON THE TCASII. ANOTHER FACTOR WAS THAT THE VISIBILITY WAS ABOUT 5 MI IN HAZE AT THE TIME. THIS ALLOWED ME TO THINK I SAW OUR TFC-TO-FOLLOW WHEN IN FACT; IT WAS TFC FOR ANOTHER RWY.