Narrative:

While approaching siler on the bowie 9 arrival to dfw; the approach controller changed the expected runway from runway 36L to runway 35C. As a result; both pilots busied ourselves with changing the approach in the FMS and resetting the MCP for the new approach. The turn at siler to arodd was not coded in the FMS and required pilot intervention to execute the turn. After a slight overflt of siler a turn was initiated to arodd and the controller then cleared us direct arodd. This overshoot of the turn was the result of 3 factors: 1) controller assigned a runway change at a critical time; 2) pilots devoted too much attention to adjusting to the runway change; and 3) the arrival in the FMS should be coded to make the turn to arodd similar to all the previous turns on the bowie 9 arrival.

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Original NASA ASRS Text

Title: B737-800 HAS MODEST TRACK DEVIATION DUE TO LATE RWY CHANGE AND NECESSARY FMS PROGRAMMING.

Narrative: WHILE APCHING SILER ON THE BOWIE 9 ARR TO DFW; THE APCH CTLR CHANGED THE EXPECTED RWY FROM RWY 36L TO RWY 35C. AS A RESULT; BOTH PLTS BUSIED OURSELVES WITH CHANGING THE APCH IN THE FMS AND RESETTING THE MCP FOR THE NEW APCH. THE TURN AT SILER TO ARODD WAS NOT CODED IN THE FMS AND REQUIRED PLT INTERVENTION TO EXECUTE THE TURN. AFTER A SLIGHT OVERFLT OF SILER A TURN WAS INITIATED TO ARODD AND THE CTLR THEN CLRED US DIRECT ARODD. THIS OVERSHOOT OF THE TURN WAS THE RESULT OF 3 FACTORS: 1) CTLR ASSIGNED A RWY CHANGE AT A CRITICAL TIME; 2) PLTS DEVOTED TOO MUCH ATTN TO ADJUSTING TO THE RWY CHANGE; AND 3) THE ARR IN THE FMS SHOULD BE CODED TO MAKE THE TURN TO ARODD SIMILAR TO ALL THE PREVIOUS TURNS ON THE BOWIE 9 ARR.

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.