Narrative:

The active runway at the time was runway 17. Intersection takeoffs were being used. I was at the taxiway B intersection on the east side of runway 17/35. From this position a left turn would yield a 3500 ft takeoff on runway 17 and a right turn would yield a 3500 ft takeoff on runway 35. The tower said turn right cleared for takeoff. I read this back, turned right and took off on runway 35. I assumed the tower had wanted me to use runway 35. I should have realized that they wanted me to take off on runway 17 and turn right after takeoff. I am not sure whether or not the tower used standard terminology but I have more than enough experience to have realized that they wanted a right turn after takeoff. I should have asked for additional clarification. After takeoff the tower called for me to make an immediate left turn, which I did.

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Original NASA ASRS Text

Title: PA24 PLT, HOLDING AT AN INTXN TO ACTIVE RWY 17, TAKES OFF ON RWY 35 AFTER MISINTERPING TWR CLRNC, 'TURN R, CLRED FOR TKOF.'

Narrative: THE ACTIVE RWY AT THE TIME WAS RWY 17. INTXN TKOFS WERE BEING USED. I WAS AT THE TXWY B INTXN ON THE E SIDE OF RWY 17/35. FROM THIS POS A L TURN WOULD YIELD A 3500 FT TKOF ON RWY 17 AND A R TURN WOULD YIELD A 3500 FT TKOF ON RWY 35. THE TWR SAID TURN R CLRED FOR TKOF. I READ THIS BACK, TURNED R AND TOOK OFF ON RWY 35. I ASSUMED THE TWR HAD WANTED ME TO USE RWY 35. I SHOULD HAVE REALIZED THAT THEY WANTED ME TO TAKE OFF ON RWY 17 AND TURN R AFTER TKOF. I AM NOT SURE WHETHER OR NOT THE TWR USED STANDARD TERMINOLOGY BUT I HAVE MORE THAN ENOUGH EXPERIENCE TO HAVE REALIZED THAT THEY WANTED A R TURN AFTER TKOF. I SHOULD HAVE ASKED FOR ADDITIONAL CLARIFICATION. AFTER TKOF THE TWR CALLED FOR ME TO MAKE AN IMMEDIATE L TURN, WHICH I DID.

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.