DISTR BY LOC AND GS FAIL FLAGS ON THEIR PFDS; FLT CREW OF MD80 CLRED FOR A VISUAL APCH TO RWY 9R AT ATL FLEW THROUGH EXTENDED CTRLINE OF THEIR APCH PATH AND ENCOUNTERED A TCASII RA WITH TFC ON APCH TO RWY 9L.

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DURING FINAL APCH TO RWY 9R IN ATL INTL ARPT; APCH CTL GAVE ME TFC INFO. HE ASKED ME IF I HAD THE TFC INSIDE. I TOLD HIM AFFIRMATIVE AND THE NEXT INSTRUCTION WAS FOLLOW THE TFC FOR A VISUAL APCH TO RWY 9R. I SELECTED THE APPROPRIATE FREQ AND COURSE FOR THE ILS TO RWY 9R; BUT THERE WERE 'LOC FAIL' AND 'GS FAIL' FLAGS IN MY PRIMARY FLT DISPLAY AND NAV DISPLAY. FOR 5-7 SECONDS; I LOST THE TFC AND DIDN'T TURN R TO CONTINUE THE VISUAL APCH TO RWY 9R. SUDDENLY; I HAD A TCASII RA. I DISCONNECTED THE AUTOPLT FOLLOWING THE TCASII RA (DSND); THEN I TURNED HEADING 120 DEGS FOR APCH INSTRUCTIONS AND CONTINUED TO LAND. IF I HADN'T ACCEPTED A VISUAL APCH MAYBE IT NEVER WOULD HAVE OCCURRED. SUPPLEMENTAL INFO FROM ACN 595437: DURING THE FINAL STAGE OF TRAINING AS A PIC WE WERE ON APCH TO RWY 9R. THE NEW CAPT (PF) AND MYSELF THE CHK PLT (PNF) UNDER CONTACT WITH ATL APCH; BOTH VHF NAV RADIOS WERE SELECTED TO THE PROPER FREQ; AS A BACK UP TO THE VISUAL APCH EXPECTED. ALTHOUGH WE WERE INSIDE THE LOC AND GS COVER WE HAD FAILURE FLAGS IN VIEW IN BOTH VHF RECEIVERS. WE MADE A XCHK TO FIGURE OUT WHAT WAS HAPPENING. WHEN WE WERE CHKING ABOUT THAT; APCH CTL ISSUED A TA. WE MADE THE CALL TO APCH THAT WE HAD THE TFC IN SIGHT; WE WERE INFORMED BY APCH THAT IT WAS ON THE LOC TO RWY 9R AND IT WAS THE TFC TO FOLLOW. WE WERE CLRED FOR A VISUAL APCH TO RWY 9R. THE PF BEGAN A TURN TO THE HEADING 300 DEGS WHEN I REALIZED THAT SOMETHING WAS WRONG. I TOLD THE PF THAT WE WERE CLRED FOR THE VISUAL APCH; BUT IT WAS TOO LATE. WE CROSSED THE VISUAL TRACK OF RWY 9R AND IT WAS WHEN WE HAD AN RA ON THE TCASII. WE WERE THEN DISTR BY THE FLAGS ON THE NAV INSTS IN A HVY TFC ENVIRONMENT WHEN WE WERE WITH A MEDIUM TO HIGH WORKLOAD.