Narrative:

Our instructions from cle ground control were to 'taxi to runway 5L, hold short of runway 32 on lima.' I took a quick glance at my airport diagram chart to find the appropriate taxiway and runways. I somehow got the impression that runway 32 (36) was farther down taxiway lima than it actually was. The next thing I heard as we were taxiing down lima was ground control to hold short of runway 36. I immediately realized our position as across the runway 36 hold short lines but well short of the runway itself. I quickly applied full braking and brought the aircraft to a stop for traffic rolling out on runway 36. I realized later that I wasn't thinking as clearly that day as I usually do. It was my 6TH consecutive duty day, 6TH leg of the day, and 11TH hour of duty. Under these circumstances I can realize how an incident could easily occur. In the future, I will be more vigilant when I know I may be tired and fatigued. Supplemental information from acn 275591: I could have prevented this incursion by making sure that the captain read back the instruction to me and/or not done the taxi check until we were stopped at the hold short line and/or gone over the airport diagram with the captain to make sure he understood where we were to hold short.

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Original NASA ASRS Text

Title: UNAUTH RWY ENTRY. NON ADHERENCE TO ATC INSTRUCTION.

Narrative: OUR INSTRUCTIONS FROM CLE GND CTL WERE TO 'TAXI TO RWY 5L, HOLD SHORT OF RWY 32 ON LIMA.' I TOOK A QUICK GLANCE AT MY ARPT DIAGRAM CHART TO FIND THE APPROPRIATE TXWY AND RWYS. I SOMEHOW GOT THE IMPRESSION THAT RWY 32 (36) WAS FARTHER DOWN TXWY LIMA THAN IT ACTUALLY WAS. THE NEXT THING I HEARD AS WE WERE TAXIING DOWN LIMA WAS GND CTL TO HOLD SHORT OF RWY 36. I IMMEDIATELY REALIZED OUR POS AS ACROSS THE RWY 36 HOLD SHORT LINES BUT WELL SHORT OF THE RWY ITSELF. I QUICKLY APPLIED FULL BRAKING AND BROUGHT THE ACFT TO A STOP FOR TFC ROLLING OUT ON RWY 36. I REALIZED LATER THAT I WASN'T THINKING AS CLRLY THAT DAY AS I USUALLY DO. IT WAS MY 6TH CONSECUTIVE DUTY DAY, 6TH LEG OF THE DAY, AND 11TH HR OF DUTY. UNDER THESE CIRCUMSTANCES I CAN REALIZE HOW AN INCIDENT COULD EASILY OCCUR. IN THE FUTURE, I WILL BE MORE VIGILANT WHEN I KNOW I MAY BE TIRED AND FATIGUED. SUPPLEMENTAL INFO FROM ACN 275591: I COULD HAVE PREVENTED THIS INCURSION BY MAKING SURE THAT THE CAPT READ BACK THE INSTRUCTION TO ME AND/OR NOT DONE THE TAXI CHK UNTIL WE WERE STOPPED AT THE HOLD SHORT LINE AND/OR GONE OVER THE ARPT DIAGRAM WITH THE CAPT TO MAKE SURE HE UNDERSTOOD WHERE WE WERE TO HOLD SHORT.

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.