A B737 CREW ON APCH TO KATL; OVERSHOT FINAL CAUSING A TCAS 'TA' RELATIVE TO TRAFFIC ON APCH TO THE PARALLEL.

Narrative

WHILE ON DOWNWIND TO LAND ON RWY 8L; ATL ARPT. ATC ADVISED TO TURN LEFT TO 120 DEGS AND JOIN LOC RWY 8L; REPORT FIELD IN SIGHT. UPON TURNING BASE; MODE CTL PANEL FUNCTION VOR/LOC WAS SELECTED. A DSCNT WAS MADE FROM 4000 FT TO 2800 FT. ATC THEN ADVISED MAINTAIN 200 KIAS UNTIL REACHING THE OM. WE REPORTED THE FIELD IN SIGHT AND WERE CLRED FOR THE VISUAL TO RWY 8L; SWITCH TO THE TWR AT THE OM. DURING THE BASE LEG TO FINAL; THE ACFT FLEW THROUGH RWY 8L LOCALIZER WITHOUT THE INDICATION ON THE FLT DIRECTOR EFIS DISPLAY. WE WERE ABOVE THE GLIDE PATH INDICATED ON THE CAPT'S ADI; BUT THE FO'S ADI WAS STILL IN HDG MODE. ALL FREQS AND COURSES SELECTED WERE CORRECT. THE MCP WAS AGAIN SELECTED FOR VOR/LOC BUT THE COURSE WAS NOW WELL TO THE LEFT OF THE ACFT'S POS. THE ACFT WAS POSITIONED BTWN THE NORTH AND SOUTH RWYS ABEAM THE TERMINALS. THE TCAS THEN ANNOUNCED A TA WITH AN ACFT LNDG ON RWY 9R. THE CAPT TOOK CTL OF THE ACFT BY DESELECTING THE AUTOPLT AND AUTOTHROTTLES FOR A GREATER THAN 30 DEG ANGLE OF BANK TO THE LEFT TO REALIGN THE ACFT ON THE NORTH RWYS. NO CALLS FROM ATC WERE RECEIVED. UPON REACHING CATTA; TWR WAS CALLED AND AN UNEVENTFUL LNDG WAS MADE. THIS FLT WAS BEING CONDUCTED BY A LINE CHECK AIRMAN (CAPT IN LEFT SEAT) AND A FO DURING AN INITIAL OPERATING FLT. THIS WAS THE FO'S 8TH TIME ARRIVING IN THE ATL TERMINAL AREA. BASIC SIMULATOR TRAINING DID NOT COVER VARIATIONS IN CONFIGN WHILE CONDUCTING APCHS. NORMAL SPDS WERE THE NORM. THE MODE CONTROL PANEL AND EFIS ARE A NEW AREA FOR THE FO.