Narrative:

Air carrier X from spot '6' was cleared to taxi to runway 9L via K3, K. We taxied onto K3, but went past K across runway 9R (an active runway) onto taxiway M. I, the first officer, was getting the weight and balance and missed helping the captain with the turn. Air carrier Y was taking off aborted takeoff and cleared the runway. K3 is an exit from an alleyway that also crosses an active runway and should be marked with flashing lights to prevent this from happening again. Also no checklists while turning. Supplemental information from acn 302610: air carrier Y cleared into position and hold on runway 9L phl. When cleared for takeoff I turned aircraft over to first officer. He added power I turned on al external lights, and called 80 KTS, at that time first officer saw air carrier X taxiing toward and onto our runway. I looked up saw X and rejected takeoff. We stopped approximately 2000 ft from X. We taxied off runway and tower cleared us to taxi back for takeoff. Supplemental information from acn 302781: aircraft Y on takeoff roll aircraft X failed to follow proper taxi instructions and crossed runway in front of departing aircraft Y. Aircraft Y aborted takeoff and turned off at taxiway 950 ft from taxiway aircraft X crossed at. Pilot of aircraft X stated on phone conversation that he 'thought' because of the traffic on the taxiway he was assigned awaiting departure we wanted him on the other side of the runway. Taxi route issued was via kilo 3 and kilo to runway 9L. Aircraft went across at kilo 3 to taxiway microphone.

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Original NASA ASRS Text

Title: ACR X RWY INCURSION HAD LTSS WITH ACR Y ON TKOF ROLL.

Narrative: ACR X FROM SPOT '6' WAS CLRED TO TAXI TO RWY 9L VIA K3, K. WE TAXIED ONTO K3, BUT WENT PAST K ACROSS RWY 9R (AN ACTIVE RWY) ONTO TXWY M. I, THE FO, WAS GETTING THE WT AND BAL AND MISSED HELPING THE CAPT WITH THE TURN. ACR Y WAS TAKING OFF ABORTED TKOF AND CLRED THE RWY. K3 IS AN EXIT FROM AN ALLEYWAY THAT ALSO CROSSES AN ACTIVE RWY AND SHOULD BE MARKED WITH FLASHING LIGHTS TO PREVENT THIS FROM HAPPENING AGAIN. ALSO NO CHKLISTS WHILE TURNING. SUPPLEMENTAL INFO FROM ACN 302610: ACR Y CLRED INTO POS AND HOLD ON RWY 9L PHL. WHEN CLRED FOR TKOF I TURNED ACFT OVER TO FO. HE ADDED PWR I TURNED ON AL EXTERNAL LIGHTS, AND CALLED 80 KTS, AT THAT TIME FO SAW ACR X TAXIING TOWARD AND ONTO OUR RWY. I LOOKED UP SAW X AND REJECTED TKOF. WE STOPPED APPROX 2000 FT FROM X. WE TAXIED OFF RWY AND TWR CLRED US TO TAXI BACK FOR TKOF. SUPPLEMENTAL INFO FROM ACN 302781: ACFT Y ON TKOF ROLL ACFT X FAILED TO FOLLOW PROPER TAXI INSTRUCTIONS AND CROSSED RWY IN FRONT OF DEPARTING ACFT Y. ACFT Y ABORTED TKOF AND TURNED OFF AT TXWY 950 FT FROM TXWY ACFT X CROSSED AT. PLT OF ACFT X STATED ON PHONE CONVERSATION THAT HE 'THOUGHT' BECAUSE OF THE TFC ON THE TXWY HE WAS ASSIGNED AWAITING DEP WE WANTED HIM ON THE OTHER SIDE OF THE RWY. TAXI RTE ISSUED WAS VIA KILO 3 AND KILO TO RWY 9L. ACFT WENT ACROSS AT KILO 3 TO TXWY MIKE.

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.