Narrative:

Was instructed to taxi to runway 27R at willow run. I taxied to runway 23L which is the active runway 90% of the time at yip. To get to runway 23L, you have to taxi down runway 27R. I called ready for runway 23L to the tower and realized that I taxied to the wrong runway and was currently on the runway I was told to taxi to. I cleared the runway at the taxiway that was behind me, and called the tower. They saw the occurrence from the tower and no other aircraft was inbound to that runway. The factors involved were a lack of attention in taxiing and the habit of taxiing to another runway.

Google
 

Original NASA ASRS Text

Title: RWY INCURSION WHEN A PART 135 AIR CARGO ACFT TAXIES TO THE WRONG RWY, USING THE CLRED TO RWY AS A TAXI RTE AT YIP, MI.

Narrative: WAS INSTRUCTED TO TAXI TO RWY 27R AT WILLOW RUN. I TAXIED TO RWY 23L WHICH IS THE ACTIVE RWY 90% OF THE TIME AT YIP. TO GET TO RWY 23L, YOU HAVE TO TAXI DOWN RWY 27R. I CALLED READY FOR RWY 23L TO THE TWR AND REALIZED THAT I TAXIED TO THE WRONG RWY AND WAS CURRENTLY ON THE RWY I WAS TOLD TO TAXI TO. I CLRED THE RWY AT THE TXWY THAT WAS BEHIND ME, AND CALLED THE TWR. THEY SAW THE OCCURRENCE FROM THE TWR AND NO OTHER ACFT WAS INBOUND TO THAT RWY. THE FACTORS INVOLVED WERE A LACK OF ATTN IN TAXIING AND THE HABIT OF TAXIING TO ANOTHER RWY.

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.