Narrative:

Aircraft X taxied to runway 28 via taxiway D on 121.8. Stopped short of runway to wait for weights -- monitored tower frequency on 124.2. Called ready for takeoff. Tower cleared flight to position and hold, runway 28. While moving aircraft to runway 28, tower cleared aircraft X for takeoff runway 28. First officer acknowledged both clrncs. Captain taxied slowly onto runway, staying close to runway threshold to take advantage of full length, and release control of aircraft to first officer. First officer took control of aircraft and applied takeoff thrust. As first officer applied power, scanned runway ahead and saw BE1900 climbing through runway 28/36 intersection. Did not hear tower or ground talk to BE1900 prior to incident. Supplemental information from acn 450508: unknown to us the other aircraft mistook our takeoff clearance and took off. My takeoff scan went to mostly outside after out 80 KT call and by then the other airplane was well clear and north of the intersection. No real conflict or close call this time because we took so long to actually roll on our takeoff -- might have been much worse. Supplemental information from acn 450404: we then received 'aircraft Y you are clear for takeoff runway heading and 3000 ft.' my captain repeated this back and said 'we need a second.' the controller said 'roger.' we then turned onto runway 36 and completed our takeoff final items checklist and the captain said to me 'cleared for takeoff, runway heading and 3000 ft.'

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Original NASA ASRS Text

Title: A DC9 FLC OBSERVED A BEECH 1900 XING THE DEP RWY ON TKOF FROM TVC.

Narrative: ACFT X TAXIED TO RWY 28 VIA TXWY D ON 121.8. STOPPED SHORT OF RWY TO WAIT FOR WTS -- MONITORED TWR FREQ ON 124.2. CALLED READY FOR TKOF. TWR CLRED FLT TO POS AND HOLD, RWY 28. WHILE MOVING ACFT TO RWY 28, TWR CLRED ACFT X FOR TKOF RWY 28. FO ACKNOWLEDGED BOTH CLRNCS. CAPT TAXIED SLOWLY ONTO RWY, STAYING CLOSE TO RWY THRESHOLD TO TAKE ADVANTAGE OF FULL LENGTH, AND RELEASE CTL OF ACFT TO FO. FO TOOK CTL OF ACFT AND APPLIED TKOF THRUST. AS FO APPLIED PWR, SCANNED RWY AHEAD AND SAW BE1900 CLBING THROUGH RWY 28/36 INTXN. DID NOT HEAR TWR OR GND TALK TO BE1900 PRIOR TO INCIDENT. SUPPLEMENTAL INFO FROM ACN 450508: UNKNOWN TO US THE OTHER ACFT MISTOOK OUR TKOF CLRNC AND TOOK OFF. MY TKOF SCAN WENT TO MOSTLY OUTSIDE AFTER OUT 80 KT CALL AND BY THEN THE OTHER AIRPLANE WAS WELL CLR AND N OF THE INTXN. NO REAL CONFLICT OR CLOSE CALL THIS TIME BECAUSE WE TOOK SO LONG TO ACTUALLY ROLL ON OUR TKOF -- MIGHT HAVE BEEN MUCH WORSE. SUPPLEMENTAL INFO FROM ACN 450404: WE THEN RECEIVED 'ACFT Y YOU ARE CLR FOR TKOF RWY HEADING AND 3000 FT.' MY CAPT REPEATED THIS BACK AND SAID 'WE NEED A SECOND.' THE CTLR SAID 'ROGER.' WE THEN TURNED ONTO RWY 36 AND COMPLETED OUR TKOF FINAL ITEMS CHKLIST AND THE CAPT SAID TO ME 'CLRED FOR TKOF, RWY HEADING AND 3000 FT.'

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.