Narrative:

Aircraft approached chicago O'hare for an ILS approach to runway 14L. Simultaneous approachs were in progress to both runway 14 left and right. Aircraft approached the 14L localizer and was vectored to an intercept heading of 180 degree or 190 degree, cleared for approach. The identify feature of the ILS was functional but weak. I was the PF (captain) on autoplt with the localizer armed for capture. The final controller switched us over to tower before intercept of the localizer. The capts localizer was not active (flag in view which is common at times until close to the course). As the localizer course became active on the first officer's side he was in the process of making a confign change and missed needle movement. He recognized it and said to turn at the same time tower did. A correction was made. Aircraft control was xferred to the first officer and the approach was completed west/O ILS information displayed on the captain's side. With WX so adverse it appeared that the controllers were sequencing traffic too close on parallel runways for the conditions. We were instructed to 'immediately turn to 110 degree and descend to 3000'.' my understanding is that parallel approachs are vectored with vertical sep to prevent conflict, and the switch to tower before the course intercept in WX contributed to this situation.

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Original NASA ASRS Text

Title: ACR WDB FLT CREW EXPERIENCES ILS RECEIVER PROBLEMS AND FLIES THROUGH LOCALIZER AT ORD.

Narrative: ACFT APCHED CHICAGO O'HARE FOR AN ILS APCH TO RWY 14L. SIMULTANEOUS APCHS WERE IN PROGRESS TO BOTH RWY 14 L AND R. ACFT APCHED THE 14L LOC AND WAS VECTORED TO AN INTERCEPT HDG OF 180 DEG OR 190 DEG, CLRED FOR APCH. THE IDENT FEATURE OF THE ILS WAS FUNCTIONAL BUT WEAK. I WAS THE PF (CAPT) ON AUTOPLT WITH THE LOC ARMED FOR CAPTURE. THE FINAL CTLR SWITCHED US OVER TO TWR BEFORE INTERCEPT OF THE LOC. THE CAPTS LOC WAS NOT ACTIVE (FLAG IN VIEW WHICH IS COMMON AT TIMES UNTIL CLOSE TO THE COURSE). AS THE LOC COURSE BECAME ACTIVE ON THE F/O'S SIDE HE WAS IN THE PROCESS OF MAKING A CONFIGN CHANGE AND MISSED NEEDLE MOVEMENT. HE RECOGNIZED IT AND SAID TO TURN AT THE SAME TIME TWR DID. A CORRECTION WAS MADE. ACFT CTL WAS XFERRED TO THE F/O AND THE APCH WAS COMPLETED W/O ILS INFO DISPLAYED ON THE CAPT'S SIDE. WITH WX SO ADVERSE IT APPEARED THAT THE CTLRS WERE SEQUENCING TFC TOO CLOSE ON PARALLEL RWYS FOR THE CONDITIONS. WE WERE INSTRUCTED TO 'IMMEDIATELY TURN TO 110 DEG AND DSND TO 3000'.' MY UNDERSTANDING IS THAT PARALLEL APCHS ARE VECTORED WITH VERT SEP TO PREVENT CONFLICT, AND THE SWITCH TO TWR BEFORE THE COURSE INTERCEPT IN WX CONTRIBUTED TO THIS SITUATION.

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.