Narrative:

Tower cleared me to taxi to runway 13R and for immediate takeoff. I taxied to convergence of runways 13 and 17. Runway marker sign idented both runways 13 and 17. I apparently did not turn left sufficiently, and took off from runway 17 instead of 13. A helicopter was maneuvering off of the end of runway 17. I never considered the helicopter to be in any danger, but it could have been a close call. Main cause was my failure to properly perceive directions of runway marker light at night, and to properly identify runway and airplane heading before beginning takeoff roll.

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Original NASA ASRS Text

Title: SMA DEPARTS WRONG RWY FROM POINT WHERE RWYS INTERSECT. HAS CLOSE ENCOUNTER WITH HELI AT END OF RWY.

Narrative: TWR CLRED ME TO TAXI TO RWY 13R AND FOR IMMEDIATE TKOF. I TAXIED TO CONVERGENCE OF RWYS 13 AND 17. RWY MARKER SIGN IDENTED BOTH RWYS 13 AND 17. I APPARENTLY DID NOT TURN L SUFFICIENTLY, AND TOOK OFF FROM RWY 17 INSTEAD OF 13. A HELI WAS MANEUVERING OFF OF THE END OF RWY 17. I NEVER CONSIDERED THE HELI TO BE IN ANY DANGER, BUT IT COULD HAVE BEEN A CLOSE CALL. MAIN CAUSE WAS MY FAILURE TO PROPERLY PERCEIVE DIRECTIONS OF RWY MARKER LIGHT AT NIGHT, AND TO PROPERLY IDENT RWY AND AIRPLANE HDG BEFORE BEGINNING TKOF ROLL.

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.