Narrative:

Light transport was taxied to runway 10R. He was really at intersection B4. Ground controller said he told him he was coming out of FBO X. He actually came out of FBO Y. Taxiway from FBO X doesn't go full length, only to intersection B4. Pilot called 'ready for takeoff runway 10R.' he didn't say anything about being at the intersection. I taxied him 'into position and hold, runway 10R.' all of a sudden I saw aircraft entering runway at intersection B4! Luckily, no other aircraft were involved. I chewed the pilot out.

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Original NASA ASRS Text

Title: TWR CTLR CLRS A CPR WESTWIND, IA1124, ONTO RWY TO HOLD FOR TKOF AND THEN OBSERVED IT TAXI ONTO THE RWY AT AN INTXN. THE LCL CTLR WAS EXPECTING THE ACFT TO BE TAXIING INTO POS AT THE DEP END OF THE RWY BASED THE LOCATION FROM WHICH HE WAS TAXIING OUT.

Narrative: LTT WAS TAXIED TO RWY 10R. HE WAS REALLY AT INTXN B4. GND CTLR SAID HE TOLD HIM HE WAS COMING OUT OF FBO X. HE ACTUALLY CAME OUT OF FBO Y. TXWY FROM FBO X DOESN'T GO FULL LENGTH, ONLY TO INTXN B4. PLT CALLED 'READY FOR TKOF RWY 10R.' HE DIDN'T SAY ANYTHING ABOUT BEING AT THE INTXN. I TAXIED HIM 'INTO POS AND HOLD, RWY 10R.' ALL OF A SUDDEN I SAW ACFT ENTERING RWY AT INTXN B4! LUCKILY, NO OTHER ACFT WERE INVOLVED. I CHEWED THE PLT OUT.

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.