Narrative:

45 mi north of dulles, we were told to maintain 230 KTS or greater and we were following a heavy airbus. ATIS was calling 6000 ft scattered, 10 mi visibility. Actual was 4000 ft overcast, 4 mi visibility. We briefed a visual approach to runway 19R. Approach vectored us through the localizer to the west, then turned us back at a 90 degree intercept. TA was received as localizer was alive and traffic alert from our TCASII activated. Approach gave us new heading to reintercept runway 19R localizer to the west and stated the localizer frequency for runway 19R. We turned back and intercepted runway 19R. Due to late turn to a localizer and high speed required and traffic conflict, our attention was distraction and we passed through the localizer. Possible confusion occurred when the PNF read back runway 19L in clearance and put it in one of the radios. The runway 19L localizer was never intercepted and no penetration of runway 19L flight path was encountered. Possible solution to problem is to reduce interception angle below 90 degrees/slow speed to 170 KTS and early alert on possible conflicting traffic below. Also, ATIS should have depicted WX as much lower than 6000 ft scattered 10 mi.

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Original NASA ASRS Text

Title: ACR FLC FLYING BAE3100 TO IAD FLEW THROUGH THE LOC COURSE WHILE BEING VECTORED AND SUBSEQUENTLY RECEIVED AN RA FROM THEIR TCASII.

Narrative: 45 MI N OF DULLES, WE WERE TOLD TO MAINTAIN 230 KTS OR GREATER AND WE WERE FOLLOWING A HVY AIRBUS. ATIS WAS CALLING 6000 FT SCATTERED, 10 MI VISIBILITY. ACTUAL WAS 4000 FT OVCST, 4 MI VISIBILITY. WE BRIEFED A VISUAL APCH TO RWY 19R. APCH VECTORED US THROUGH THE LOC TO THE W, THEN TURNED US BACK AT A 90 DEG INTERCEPT. TA WAS RECEIVED AS LOC WAS ALIVE AND TFC ALERT FROM OUR TCASII ACTIVATED. APCH GAVE US NEW HDG TO REINTERCEPT RWY 19R LOC TO THE W AND STATED THE LOC FREQ FOR RWY 19R. WE TURNED BACK AND INTERCEPTED RWY 19R. DUE TO LATE TURN TO A LOC AND HIGH SPD REQUIRED AND TFC CONFLICT, OUR ATTN WAS DISTR AND WE PASSED THROUGH THE LOC. POSSIBLE CONFUSION OCCURRED WHEN THE PNF READ BACK RWY 19L IN CLRNC AND PUT IT IN ONE OF THE RADIOS. THE RWY 19L LOC WAS NEVER INTERCEPTED AND NO PENETRATION OF RWY 19L FLT PATH WAS ENCOUNTERED. POSSIBLE SOLUTION TO PROB IS TO REDUCE INTERCEPTION ANGLE BELOW 90 DEGS/SLOW SPD TO 170 KTS AND EARLY ALERT ON POSSIBLE CONFLICTING TFC BELOW. ALSO, ATIS SHOULD HAVE DEPICTED WX AS MUCH LOWER THAN 6000 FT SCATTERED 10 MI.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.