Narrative:

Taxied out to echo intersection. Winds reported light and variable. Very light load (10 passenger, 3 crew), so requested intersection departure. Were cleared for takeoff on 8 and turned left instead of right. Made immediate takeoff on runway 26. At approximately 300' AGL controller issued a turn to 360 degrees, 'immediately,' and informed us we had been cleared for takeoff on runway 8. We turned immediately--consideration was an medium large transport approximately 4 mi on approach to runway 8. Felt most contributing factor was pilot fatigue. This was the last leg of a 7 leg day, including a 1 1/2 hour VFR flight-see tour in very marginal WX. Our duty day had started at XX45 am with no scheduled breaks and short turnarounds between flts, with no chance to eat. We had gone into the terminal to grab a meal to be consumed in flight, agents holding door from being closed. We were rushed due to our company's scheduling.

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Original NASA ASRS Text

Title: ACR MDT TKOF ON WRONG RWY AT ITO. OPPOSITE DIRECTION FROM TWR CLRNC.

Narrative: TAXIED OUT TO ECHO INTXN. WINDS RPTED LIGHT AND VARIABLE. VERY LIGHT LOAD (10 PAX, 3 CREW), SO REQUESTED INTXN DEP. WERE CLRED FOR TKOF ON 8 AND TURNED LEFT INSTEAD OF RIGHT. MADE IMMEDIATE TKOF ON RWY 26. AT APPROX 300' AGL CTLR ISSUED A TURN TO 360 DEGS, 'IMMEDIATELY,' AND INFORMED US WE HAD BEEN CLRED FOR TKOF ON RWY 8. WE TURNED IMMEDIATELY--CONSIDERATION WAS AN MLG APPROX 4 MI ON APCH TO RWY 8. FELT MOST CONTRIBUTING FACTOR WAS PLT FATIGUE. THIS WAS THE LAST LEG OF A 7 LEG DAY, INCLUDING A 1 1/2 HR VFR FLT-SEE TOUR IN VERY MARGINAL WX. OUR DUTY DAY HAD STARTED AT XX45 AM WITH NO SCHEDULED BREAKS AND SHORT TURNAROUNDS BTWN FLTS, WITH NO CHANCE TO EAT. WE HAD GONE INTO THE TERMINAL TO GRAB A MEAL TO BE CONSUMED IN FLT, AGENTS HOLDING DOOR FROM BEING CLOSED. WE WERE RUSHED DUE TO OUR COMPANY'S SCHEDULING.

Data retrieved from NASA's ASRS site as of August 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.