Narrative:

I was filed IFR from unv airport, PA, to aoo, PA, due to fog at the departure airport. While holding for release, the field apparently went to VMC, although I didn't realize it. There was a lot of instrument traffic, so as soon as I was released by ZNY, I executed an immediate departure in order to expedite the next approach. Just as I turned onto the active, I saw landing lights approaching through the haze about a mi or so out. I made a quick decision to continue the takeoff as fast as I could, rather than turn around and return to the taxiway (I didn't know what was behind me). Apparently, I caused the go around of an arriving commuter aircraft, by the remarks of a very annoyed captain. I assumed that we were still IFR, and since I was released, there was no one on approach. My #2 radio was giving problems (I was on my way to the avionics shop), so I was trying to switch back and forth from center to unicom (advisory) frequencys with 1 radio. I missed the report of the landing traffic, which evidently was VFR at that point. Under the circumstances, I executed what I considered to be the most prudent action to avoid an accident, and also to not delay the landing airliner. Apparently, the latter intention did not work.

Google
 

Original NASA ASRS Text

Title: PLT TAXIED ONTO RWY WITH ARR TFC ON SHORT FINAL. ARR TFC EXECUTED A GAR.

Narrative: I WAS FILED IFR FROM UNV ARPT, PA, TO AOO, PA, DUE TO FOG AT THE DEP ARPT. WHILE HOLDING FOR RELEASE, THE FIELD APPARENTLY WENT TO VMC, ALTHOUGH I DIDN'T REALIZE IT. THERE WAS A LOT OF INST TFC, SO AS SOON AS I WAS RELEASED BY ZNY, I EXECUTED AN IMMEDIATE DEP IN ORDER TO EXPEDITE THE NEXT APCH. JUST AS I TURNED ONTO THE ACTIVE, I SAW LNDG LIGHTS APCHING THROUGH THE HAZE ABOUT A MI OR SO OUT. I MADE A QUICK DECISION TO CONTINUE THE TKOF AS FAST AS I COULD, RATHER THAN TURN AROUND AND RETURN TO THE TXWY (I DIDN'T KNOW WHAT WAS BEHIND ME). APPARENTLY, I CAUSED THE GAR OF AN ARRIVING COMMUTER ACFT, BY THE REMARKS OF A VERY ANNOYED CAPT. I ASSUMED THAT WE WERE STILL IFR, AND SINCE I WAS RELEASED, THERE WAS NO ONE ON APCH. MY #2 RADIO WAS GIVING PROBS (I WAS ON MY WAY TO THE AVIONICS SHOP), SO I WAS TRYING TO SWITCH BACK AND FORTH FROM CTR TO UNICOM (ADVISORY) FREQS WITH 1 RADIO. I MISSED THE RPT OF THE LNDG TFC, WHICH EVIDENTLY WAS VFR AT THAT POINT. UNDER THE CIRCUMSTANCES, I EXECUTED WHAT I CONSIDERED TO BE THE MOST PRUDENT ACTION TO AVOID AN ACCIDENT, AND ALSO TO NOT DELAY THE LNDG AIRLINER. APPARENTLY, THE LATTER INTENTION DID NOT WORK.

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.