Narrative:

A helicopter Y made an approach for a landing while I (X) was taking off. By the time it was spotted and I determined that it would attempt a landing, it was too late to abort the takeoff. I (X) was in a line (third) of 5 aircraft taking off, and the only xmissions heard were those of the aircraft departing before me. No xmissions were made by anyone desiring to land. The helicopter's (Y) approach was low and out of sight from the takeoff end of the runway. When I realized that the helicopter (Y) was landing, I (X) climbed as steeply as possible, and passed over the area where it had begun to hover at about 500' AGL (my altitude). There was a short period after I saw the helicopter (Y) in which I could have aborted the takeoff if I had realized where it was going. I have thought about the incident quite a bit, and still am not sure what I would have done differently. I am used to hearing helicopter pilots announce their positions in a much more diligent manner than other aircraft, so I may have been predisposed to assume the helicopter wasn't landing when I first saw it, since there hadn't been any announcements of its intentions.

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Original NASA ASRS Text

Title: LIGHT ACFT HAS NMAC WITH HELICOPTER AT UNCONTROLLED ARPT.

Narrative: A HELI Y MADE AN APCH FOR A LNDG WHILE I (X) WAS TAKING OFF. BY THE TIME IT WAS SPOTTED AND I DETERMINED THAT IT WOULD ATTEMPT A LNDG, IT WAS TOO LATE TO ABORT THE TKOF. I (X) WAS IN A LINE (THIRD) OF 5 ACFT TAKING OFF, AND THE ONLY XMISSIONS HEARD WERE THOSE OF THE ACFT DEPARTING BEFORE ME. NO XMISSIONS WERE MADE BY ANYONE DESIRING TO LAND. THE HELI'S (Y) APCH WAS LOW AND OUT OF SIGHT FROM THE TKOF END OF THE RWY. WHEN I REALIZED THAT THE HELI (Y) WAS LNDG, I (X) CLIMBED AS STEEPLY AS POSSIBLE, AND PASSED OVER THE AREA WHERE IT HAD BEGUN TO HOVER AT ABOUT 500' AGL (MY ALT). THERE WAS A SHORT PERIOD AFTER I SAW THE HELI (Y) IN WHICH I COULD HAVE ABORTED THE TKOF IF I HAD REALIZED WHERE IT WAS GOING. I HAVE THOUGHT ABOUT THE INCIDENT QUITE A BIT, AND STILL AM NOT SURE WHAT I WOULD HAVE DONE DIFFERENTLY. I AM USED TO HEARING HELI PLTS ANNOUNCE THEIR POSITIONS IN A MUCH MORE DILIGENT MANNER THAN OTHER ACFT, SO I MAY HAVE BEEN PREDISPOSED TO ASSUME THE HELI WASN'T LNDG WHEN I FIRST SAW IT, SINCE THERE HADN'T BEEN ANY ANNOUNCEMENTS OF ITS INTENTIONS.

Data retrieved from NASA's ASRS site as of August 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.