Narrative:

Descending into lax via the civet 5 arrival; ATC changed runways just prior to rustt. We changed the arrival/runway in the FMS; but arrived at rustt in the transition before the new arrival/runway had been executed and updated to our actual location on the STAR. We overshot the turn at rustt; but corrected promptly. In retrospect we should have left the old arrival in the FMS until beyond the turn at rustt; since both of the arrivals are the same until civet. Then; after the turn; we could have changed the arrival/runway with much less confusion.

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Original NASA ASRS Text

Title: B757 FLT CREW HAS A CLOSE-IN RWY CHANGE ISSUED AND HAS A TRACKING/HDG DEV DURING THE CIVET 5 ARR TO LAX.

Narrative: DESCENDING INTO LAX VIA THE CIVET 5 ARR; ATC CHANGED RWYS JUST PRIOR TO RUSTT. WE CHANGED THE ARR/RWY IN THE FMS; BUT ARRIVED AT RUSTT IN THE TRANSITION BEFORE THE NEW ARR/RWY HAD BEEN EXECUTED AND UPDATED TO OUR ACTUAL LOCATION ON THE STAR. WE OVERSHOT THE TURN AT RUSTT; BUT CORRECTED PROMPTLY. IN RETROSPECT WE SHOULD HAVE LEFT THE OLD ARR IN THE FMS UNTIL BEYOND THE TURN AT RUSTT; SINCE BOTH OF THE ARRIVALS ARE THE SAME UNTIL CIVET. THEN; AFTER THE TURN; WE COULD HAVE CHANGED THE ARR/RWY WITH MUCH LESS CONFUSION.

Data retrieved from NASA's ASRS site as of January 2009 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.