Narrative:

The event happened on the ground at bhb. The airplane was an small aircraft (I was taxiing). I had a plane load of passenger and was ready to backtaxi down the active runway for takeoff. The runway 22 at bhb has a hump in the middle of its 5000' runway and aircraft at one end can't see any aircraft on the runway if they are at the other end. I taxied to the hold short lines and transmitted 'bar harbor traffic, nxxxx would like to back taxi on runway 22, any traffic please advise.' I then waited 5 seconds and then taxied onto the runway. I then transmitted 'bar harbor traffic, north back taxi on 22.' I went approximately 50' (about 5 seconds) when another pilot in the air (who knows me) transmitted, '(my name) get off the runway, air carrier airlines is taking off.' I quickly taxied off the runway and was approximately 100' off the runway when I heard, 'air carrier, we'll abort.' the airliner, an light transport, aborted its takeoff, taxied down to the end of the runway, turned around on runway 4 and called its takeoff xmissions over unicom and departed. I taxied to runway 22 via runway 35 and then departed. Bhb has no txwys and you must back taxi on the active or cross the active I taxi on another runway. I feel this could be a dangerous situation sometime. I would have continued on the active and into the airliner possibly if my friend hadn't told me to get off the runway.

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Original NASA ASRS Text

Title: ACR LTT BEGAN TKOF WHILE SMA BACKTAXIING ON RWY.

Narrative: THE EVENT HAPPENED ON THE GND AT BHB. THE AIRPLANE WAS AN SMA (I WAS TAXIING). I HAD A PLANE LOAD OF PAX AND WAS READY TO BACKTAXI DOWN THE ACTIVE RWY FOR TKOF. THE RWY 22 AT BHB HAS A HUMP IN THE MIDDLE OF ITS 5000' RWY AND ACFT AT ONE END CAN'T SEE ANY ACFT ON THE RWY IF THEY ARE AT THE OTHER END. I TAXIED TO THE HOLD SHORT LINES AND XMITTED 'BAR HARBOR TFC, NXXXX WOULD LIKE TO BACK TAXI ON RWY 22, ANY TFC PLEASE ADVISE.' I THEN WAITED 5 SECS AND THEN TAXIED ONTO THE RWY. I THEN XMITTED 'BAR HARBOR TFC, N BACK TAXI ON 22.' I WENT APPROX 50' (ABOUT 5 SECS) WHEN ANOTHER PLT IN THE AIR (WHO KNOWS ME) XMITTED, '(MY NAME) GET OFF THE RWY, ACR AIRLINES IS TAKING OFF.' I QUICKLY TAXIED OFF THE RWY AND WAS APPROX 100' OFF THE RWY WHEN I HEARD, 'ACR, WE'LL ABORT.' THE AIRLINER, AN LTT, ABORTED ITS TKOF, TAXIED DOWN TO THE END OF THE RWY, TURNED AROUND ON RWY 4 AND CALLED ITS TKOF XMISSIONS OVER UNICOM AND DEPARTED. I TAXIED TO RWY 22 VIA RWY 35 AND THEN DEPARTED. BHB HAS NO TXWYS AND YOU MUST BACK TAXI ON THE ACTIVE OR CROSS THE ACTIVE I TAXI ON ANOTHER RWY. I FEEL THIS COULD BE A DANGEROUS SITUATION SOMETIME. I WOULD HAVE CONTINUED ON THE ACTIVE AND INTO THE AIRLINER POSSIBLY IF MY FRIEND HADN'T TOLD ME TO GET OFF THE RWY.

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.