Narrative:

On departure from luk; we were told to back taxi on runway 21L for runway 25. While taxiing down runway 21L; I as PNF; was given new departure procedure. As this procedure not in database or FMS; I had to reprogram; totally distracting me during departure routines. This also led to PF going over changed departure procedure with me; also distracting him to a point. We completed takeoff checklist after resolving this issue. While still taxiing to end; on tower frequency we were asked 'ready for takeoff?' which we were; and I acknowledged and read back takeoff clearance of 'cleared for takeoff runway 25; turn left on departure to 180 degrees.' we made the 180 degree turn on the runway and took off on runway 21L in error; neither of us realizing error until called by tower controller who advised of error. No conflicts luckily. The cause of this after some reflection on it by the two of us was: #1 -- there was distraction or confusion on my part during the reprogramming of FMS; leading to rushing. The bottom line is: never; never rush. Pull into holding area; take your time and don't get out of your routine.

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Original NASA ASRS Text

Title: A C550 CREW DURING TAXI WERE GIVEN A NEW CLRNC REQUIRING FMS WORK AND SUBSEQUENTLY DEPARTED ON THE WRONG RWY.

Narrative: ON DEP FROM LUK; WE WERE TOLD TO BACK TAXI ON RWY 21L FOR RWY 25. WHILE TAXIING DOWN RWY 21L; I AS PNF; WAS GIVEN NEW DEP PROC. AS THIS PROC NOT IN DATABASE OR FMS; I HAD TO REPROGRAM; TOTALLY DISTRACTING ME DURING DEP ROUTINES. THIS ALSO LED TO PF GOING OVER CHANGED DEP PROC WITH ME; ALSO DISTRACTING HIM TO A POINT. WE COMPLETED TKOF CHKLIST AFTER RESOLVING THIS ISSUE. WHILE STILL TAXIING TO END; ON TWR FREQ WE WERE ASKED 'READY FOR TKOF?' WHICH WE WERE; AND I ACKNOWLEDGED AND READ BACK TKOF CLRNC OF 'CLRED FOR TKOF RWY 25; TURN L ON DEP TO 180 DEGS.' WE MADE THE 180 DEG TURN ON THE RWY AND TOOK OFF ON RWY 21L IN ERROR; NEITHER OF US REALIZING ERROR UNTIL CALLED BY TWR CTLR WHO ADVISED OF ERROR. NO CONFLICTS LUCKILY. THE CAUSE OF THIS AFTER SOME REFLECTION ON IT BY THE TWO OF US WAS: #1 -- THERE WAS DISTR OR CONFUSION ON MY PART DURING THE REPROGRAMMING OF FMS; LEADING TO RUSHING. THE BOTTOM LINE IS: NEVER; NEVER RUSH. PULL INTO HOLDING AREA; TAKE YOUR TIME AND DON'T GET OUT OF YOUR ROUTINE.

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.