Narrative:

I had just completed a charter for a passenger who was on a narrow deadline and was in a big hurry, and I expedited the drop off. I also had a dinner engagement at home 20 mins after my arrival there, so I was in a very rushed frame of mind. My taxi instructions were initially to hold short of runway 6 to runway 10R, then was cleared to cross. I taxied out of GA and turned on the parallel, thinking I was paralleling runway 10R. I know the signs are the required type but they didn't get my attention. There is a lot of snow piled from recent snows. I did a ground VOR check, runup, and announced ready for departure. I saw the threshold and did a rolling takeoff when cleared for departure. I noticed the directional gyroscope didn't agree with runway 10R but knew the mechanism had been sticking so I reset it to 000 degrees. On climb out, at approximately 200 ft AGL, I glimpsed an intersecting runway running to my right. At that point I realized I had inadvertently departed runway 6, not runway 10R as cleared. I immediately turned and paralleled runway 10R and flew as directed from departure. At no time did ATC question my taxi or position prior to departure.

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Original NASA ASRS Text

Title: ATX PLT OF SMA ACFT INADVERTENT TKOF FROM THE WRONG RWY.

Narrative: I HAD JUST COMPLETED A CHARTER FOR A PAX WHO WAS ON A NARROW DEADLINE AND WAS IN A BIG HURRY, AND I EXPEDITED THE DROP OFF. I ALSO HAD A DINNER ENGAGEMENT AT HOME 20 MINS AFTER MY ARR THERE, SO I WAS IN A VERY RUSHED FRAME OF MIND. MY TAXI INSTRUCTIONS WERE INITIALLY TO HOLD SHORT OF RWY 6 TO RWY 10R, THEN WAS CLRED TO CROSS. I TAXIED OUT OF GA AND TURNED ON THE PARALLEL, THINKING I WAS PARALLELING RWY 10R. I KNOW THE SIGNS ARE THE REQUIRED TYPE BUT THEY DIDN'T GET MY ATTN. THERE IS A LOT OF SNOW PILED FROM RECENT SNOWS. I DID A GND VOR CHK, RUNUP, AND ANNOUNCED READY FOR DEP. I SAW THE THRESHOLD AND DID A ROLLING TKOF WHEN CLRED FOR DEP. I NOTICED THE DIRECTIONAL GYROSCOPE DIDN'T AGREE WITH RWY 10R BUT KNEW THE MECHANISM HAD BEEN STICKING SO I RESET IT TO 000 DEGS. ON CLBOUT, AT APPROX 200 FT AGL, I GLIMPSED AN INTERSECTING RWY RUNNING TO MY R. AT THAT POINT I REALIZED I HAD INADVERTENTLY DEPARTED RWY 6, NOT RWY 10R AS CLRED. I IMMEDIATELY TURNED AND PARALLELED RWY 10R AND FLEW AS DIRECTED FROM DEP. AT NO TIME DID ATC QUESTION MY TAXI OR POS PRIOR TO DEP.

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.