Narrative:

Runway incursion of runway 21 in chs. First officer and myself heard taxi via taxiway a and hold short of runway 15, which was done. When cleared to cross, we heard taxi to runway 15, which meant crossing runway 21. Our weight and balance numbers showed runway 15. We saw a helicopter on ILS to runway 21. He passed and we crossed runway 21. Ground caught us and we professed our confusion. WX was VMC. We looked both ways and there were no traffic conflicts. We continued to runway 15. ATC said, 'we need not call them and the issue is over.' contributing factors: captain, last leg of 4 day and 12 hour day. First officer, new to aircraft, about to be furloughed (again) with a disastrous pension implication. Mind was wandering and under stress.

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Original NASA ASRS Text

Title: A B733 CREW, TAXIING FOR TKOF AT CHS, CROSSED AN ACTIVE RWY THEY WERE TO HOLD SHORT OF.

Narrative: RWY INCURSION OF RWY 21 IN CHS. FO AND MYSELF HEARD TAXI VIA TXWY A AND HOLD SHORT OF RWY 15, WHICH WAS DONE. WHEN CLRED TO CROSS, WE HEARD TAXI TO RWY 15, WHICH MEANT XING RWY 21. OUR WT AND BAL NUMBERS SHOWED RWY 15. WE SAW A HELI ON ILS TO RWY 21. HE PASSED AND WE CROSSED RWY 21. GND CAUGHT US AND WE PROFESSED OUR CONFUSION. WX WAS VMC. WE LOOKED BOTH WAYS AND THERE WERE NO TFC CONFLICTS. WE CONTINUED TO RWY 15. ATC SAID, 'WE NEED NOT CALL THEM AND THE ISSUE IS OVER.' CONTRIBUTING FACTORS: CAPT, LAST LEG OF 4 DAY AND 12 HR DAY. FO, NEW TO ACFT, ABOUT TO BE FURLOUGHED (AGAIN) WITH A DISASTROUS PENSION IMPLICATION. MIND WAS WANDERING AND UNDER STRESS.

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.