Narrative:

It was the first leg of the day so I was PF and the first officer was handling PNF duties. As we taxied from the ramp for takeoff, my new first officer was asking questions about the EFIS/FMS and I was explaining things about it as we were taxiing. During the explanation (and taxiing) our taxi clearance changed and the first officer read back the clearance, but I was apparently more concerned about maintaining my train of thought and didn't really notice. As we were holding short of runway 5R, we got clearance from the tower to cross runway 5R and hold the position on runway 5L. We were moving onto runway 5R when tower asked if we were on taxiway north, and at the same time I realized there was no taxiway on the other side of runway 5R going to runway 5L where we were (at the end). The first officer immediately replied 'no' and I turned to taxi up the runway to clear at taxiway north to runway 5L. Before I got to taxiway north, tower issued a takeoff clearance for us from runway 5R and we continued the takeoff roll without further incident. The traffic on final for runway 5R was 3 mi out at the time. The incursion could have been prevented by greater pilot attention during the taxi phase. Even though the first officer's questions about the EFIS/FMS seemed pertinent to the flight and I considered it appropriate conversation during a sterile cockpit phase, a more appropriate action would have been to go to a spot where we could stop the airplane, answer all the first officer's questions, and then resume taxiing.

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Original NASA ASRS Text

Title: CAPT OF AN AERO COMMANDED 695 (AC95) OVERSHOT THE TXWY GIVEN IN HIS TAXI ROUTING FOR GOING TO HIS ASSIGNED RWY FOR TKOF AND CONSEQUENTLY ENDED UP ON A TXWY TIE-IN THAT HAD NO EGRESS TO THE OTHER PARALLEL RWY TO WHICH HE WAS CLRED. THEREFORE, THE CTLR CLRED HIM FOR TKOF ON THE OTHER RWY SINCE THERE WOULD BE NO TFC CONFLICTION.

Narrative: IT WAS THE FIRST LEG OF THE DAY SO I WAS PF AND THE FO WAS HANDLING PNF DUTIES. AS WE TAXIED FROM THE RAMP FOR TKOF, MY NEW FO WAS ASKING QUESTIONS ABOUT THE EFIS/FMS AND I WAS EXPLAINING THINGS ABOUT IT AS WE WERE TAXIING. DURING THE EXPLANATION (AND TAXIING) OUR TAXI CLRNC CHANGED AND THE FO READ BACK THE CLRNC, BUT I WAS APPARENTLY MORE CONCERNED ABOUT MAINTAINING MY TRAIN OF THOUGHT AND DIDN'T REALLY NOTICE. AS WE WERE HOLDING SHORT OF RWY 5R, WE GOT CLRNC FROM THE TWR TO CROSS RWY 5R AND HOLD THE POS ON RWY 5L. WE WERE MOVING ONTO RWY 5R WHEN TWR ASKED IF WE WERE ON TXWY N, AND AT THE SAME TIME I REALIZED THERE WAS NO TXWY ON THE OTHER SIDE OF RWY 5R GOING TO RWY 5L WHERE WE WERE (AT THE END). THE FO IMMEDIATELY REPLIED 'NO' AND I TURNED TO TAXI UP THE RWY TO CLR AT TXWY N TO RWY 5L. BEFORE I GOT TO TXWY N, TWR ISSUED A TKOF CLRNC FOR US FROM RWY 5R AND WE CONTINUED THE TKOF ROLL WITHOUT FURTHER INCIDENT. THE TFC ON FINAL FOR RWY 5R WAS 3 MI OUT AT THE TIME. THE INCURSION COULD HAVE BEEN PREVENTED BY GREATER PLT ATTN DURING THE TAXI PHASE. EVEN THOUGH THE FO'S QUESTIONS ABOUT THE EFIS/FMS SEEMED PERTINENT TO THE FLT AND I CONSIDERED IT APPROPRIATE CONVERSATION DURING A STERILE COCKPIT PHASE, A MORE APPROPRIATE ACTION WOULD HAVE BEEN TO GO TO A SPOT WHERE WE COULD STOP THE AIRPLANE, ANSWER ALL THE FO'S QUESTIONS, AND THEN RESUME TAXIING.

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.