Narrative:

Taxiing out for takeoff at las at night. Cleared to cross runway 1R and 1L. Not familiar with airport. After captain taxiied across runway 1R there was a taxiway in the middle of the runways thinking that was runway 1L, turned onto runway 1L, causing a commercial aircraft to go around. I believe the cause of confusion was created by poor markings and an unfamiliar part of the airport at night. We taxied clear, no further incident. Callback conversation with reporter revealed the following information: commented that he and the captain were unfamiliar with the airport and its layout and that the captain called the tower upon reaching his destination.

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Original NASA ASRS Text

Title: DC10 FLC MISTAKENLY TURN ONTO ACTIVE RWY DURING TAXI OUT DURING NIGHT OP AT UNFAMILIAR LAS ARPT CAUSING THE TWR TO SEND ANOTHER ACFT AROUND.

Narrative: TAXIING OUT FOR TKOF AT LAS AT NIGHT. CLRED TO CROSS RWY 1R AND 1L. NOT FAMILIAR WITH ARPT. AFTER CAPT TAXIIED ACROSS RWY 1R THERE WAS A TXWY IN THE MIDDLE OF THE RWYS THINKING THAT WAS RWY 1L, TURNED ONTO RWY 1L, CAUSING A COMMERCIAL ACFT TO GAR. I BELIEVE THE CAUSE OF CONFUSION WAS CREATED BY POOR MARKINGS AND AN UNFAMILIAR PART OF THE ARPT AT NIGHT. WE TAXIED CLR, NO FURTHER INCIDENT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: COMMENTED THAT HE AND THE CAPT WERE UNFAMILIAR WITH THE ARPT AND ITS LAYOUT AND THAT THE CAPT CALLED THE TWR UPON REACHING HIS DEST.

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.