Narrative:

This was my 4TH consecutive day flying. The week had been particularly stressful. Our rest period the previous night was reduced by scheduling. It was my last leg before 4 days off. We were delayed by a ground stop for 1 hour. By the time I obtained new WX, a new release, and dealt with many unhappy people on the ground in jln, my brain was fatigued to say the least. My low time first officer was also a detriment. Our taxi clearance was to taxi to runway 12. In my mind I knew the route to runway 12. It was, however, incorrect. I was about to cross runway 12 when I realized I was wrong. I applied reverse and brakes and came to a stop beyond the hold short lines. A cpr jet was about 2 mi out on final to runway 12 on the ILS. Ground also noticed this mistake and called us. I told ATC I would make a 180 degree turn and proceed the correct route to runway 12. They said okay and I made a u-turn. I was well clear of runway 12 when the jet landed. I apologized several times. Tower said 'not to worry about it.' I feel bad as a professional pilot that I allowed fatigue and stress to cloud my judgement. I most definitely learned from this experience. Fatigue and stress are very real factors in the commuter world, and you can bet my taxi clrncs will be verified and understood clearly from now on.

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Original NASA ASRS Text

Title: A BA3100 PIC USED THE WRONG TAXI RTE TO HIS ASSIGNED RWY AND ENTERED IT WITHOUT CLRNC FROM TWR AT JLN, MO.

Narrative: THIS WAS MY 4TH CONSECUTIVE DAY FLYING. THE WEEK HAD BEEN PARTICULARLY STRESSFUL. OUR REST PERIOD THE PREVIOUS NIGHT WAS REDUCED BY SCHEDULING. IT WAS MY LAST LEG BEFORE 4 DAYS OFF. WE WERE DELAYED BY A GND STOP FOR 1 HR. BY THE TIME I OBTAINED NEW WX, A NEW RELEASE, AND DEALT WITH MANY UNHAPPY PEOPLE ON THE GND IN JLN, MY BRAIN WAS FATIGUED TO SAY THE LEAST. MY LOW TIME FO WAS ALSO A DETRIMENT. OUR TAXI CLRNC WAS TO TAXI TO RWY 12. IN MY MIND I KNEW THE RTE TO RWY 12. IT WAS, HOWEVER, INCORRECT. I WAS ABOUT TO CROSS RWY 12 WHEN I REALIZED I WAS WRONG. I APPLIED REVERSE AND BRAKES AND CAME TO A STOP BEYOND THE HOLD SHORT LINES. A CPR JET WAS ABOUT 2 MI OUT ON FINAL TO RWY 12 ON THE ILS. GND ALSO NOTICED THIS MISTAKE AND CALLED US. I TOLD ATC I WOULD MAKE A 180 DEG TURN AND PROCEED THE CORRECT RTE TO RWY 12. THEY SAID OKAY AND I MADE A U-TURN. I WAS WELL CLR OF RWY 12 WHEN THE JET LANDED. I APOLOGIZED SEVERAL TIMES. TWR SAID 'NOT TO WORRY ABOUT IT.' I FEEL BAD AS A PROFESSIONAL PLT THAT I ALLOWED FATIGUE AND STRESS TO CLOUD MY JUDGEMENT. I MOST DEFINITELY LEARNED FROM THIS EXPERIENCE. FATIGUE AND STRESS ARE VERY REAL FACTORS IN THE COMMUTER WORLD, AND YOU CAN BET MY TAXI CLRNCS WILL BE VERIFIED AND UNDERSTOOD CLRLY FROM NOW ON.

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.