Narrative:

After finishing all the after start procedures, we contacted ATC and advised them we were ready to taxi. They cleared us to runway 17R. At that time the captain requested runway 31, so I called ground and requested runway 31 and they authority/authorized it. Then, they changed the ATIS, so I pulled the opc and got all the input from it back to the FMC. By the time I finished the procedure, we were already at the approach end of runway 31, inside the runway and without clearance. I called ATC and advised them that we just had an incursion onto runway 31 without clearance. Tower instructed us to execute the takeoff on runway 31. We executed the takeoff without any further incidents. Contributing factors: low visibility, change in runways after start of taxiing, change in ATIS, 1 pilot doing the taxi, same controller for ground and tower, very short taxi. Corrective actions: even with 3 mi visibility, we should not have continued the taxi until all data had been input in the FMC.

Google
 

Original NASA ASRS Text

Title: B737-300 CAPT INADVERTENTLY TAXIED ONTO ACTIVE RWY PRIOR TO CLRNC.

Narrative: AFTER FINISHING ALL THE AFTER START PROCS, WE CONTACTED ATC AND ADVISED THEM WE WERE READY TO TAXI. THEY CLRED US TO RWY 17R. AT THAT TIME THE CAPT REQUESTED RWY 31, SO I CALLED GND AND REQUESTED RWY 31 AND THEY AUTH IT. THEN, THEY CHANGED THE ATIS, SO I PULLED THE OPC AND GOT ALL THE INPUT FROM IT BACK TO THE FMC. BY THE TIME I FINISHED THE PROC, WE WERE ALREADY AT THE APCH END OF RWY 31, INSIDE THE RWY AND WITHOUT CLRNC. I CALLED ATC AND ADVISED THEM THAT WE JUST HAD AN INCURSION ONTO RWY 31 WITHOUT CLRNC. TWR INSTRUCTED US TO EXECUTE THE TKOF ON RWY 31. WE EXECUTED THE TKOF WITHOUT ANY FURTHER INCIDENTS. CONTRIBUTING FACTORS: LOW VISIBILITY, CHANGE IN RWYS AFTER START OF TAXIING, CHANGE IN ATIS, 1 PLT DOING THE TAXI, SAME CTLR FOR GND AND TWR, VERY SHORT TAXI. CORRECTIVE ACTIONS: EVEN WITH 3 MI VISIBILITY, WE SHOULD NOT HAVE CONTINUED THE TAXI UNTIL ALL DATA HAD BEEN INPUT IN THE FMC.

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.