Narrative:

I asked passenger to taxi and follow the blue taxi lights. I was checking departure frequency and route heading. When I looked up, we had passed the hold short marking. The plane was about half way onto the runway. I stopped the airplane and saw the other airplane about 1 and a half miles out on approach. I was going to ask tower for instruction, but other pilot had noticed my intrusion and was instructed to go around. I was then cleared for takeoff. And was asked to call the tower by telephone the next day, which I did.

Related reports:

Google
 

Original NASA ASRS Text

Title: CESSNA 310 PAX MISTAKENLY TAXIIED ON TO ACTIVE RWY RESULTING IN TWR SENDING ANOTHER ACFT ON APCH AROUND.

Narrative: I ASKED PAX TO TAXI AND FOLLOW THE BLUE TAXI LIGHTS. I WAS CHKING DEP FREQ AND RTE HEADING. WHEN I LOOKED UP, WE HAD PASSED THE HOLD SHORT MARKING. THE PLANE WAS ABOUT HALF WAY ONTO THE RWY. I STOPPED THE AIRPLANE AND SAW THE OTHER AIRPLANE ABOUT 1 AND A HALF MILES OUT ON APCH. I WAS GOING TO ASK TWR FOR INSTRUCTION, BUT OTHER PLT HAD NOTICED MY INTRUSION AND WAS INSTRUCTED TO GAR. I WAS THEN CLRED FOR TKOF. AND WAS ASKED TO CALL THE TWR BY TELEPHONE THE NEXT DAY, WHICH I DID.

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.