Narrative:

We were cleared for takeoff and upon advancing throttles the confign warning horn sounded. Closed throttles and taxied clear of the runway. Recycled spdbrake, flaps and trim, all appeared normal. Cycled throttles and configns warning horn did not sound. We speculated that the somewhat aft trim setting may have caused the horn. Stabilizer trim was set somewhat aft and may have caused the horn to sound (it was within the green band but at the high end of the band). Aircraft speed was low, did not exceed 10-15 KTS. All systems checked normal. Reported reason to tower and proceeded with the flight.

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Original NASA ASRS Text

Title: ABORT TKOF WHEN TKOF WARNING HORN SOUNDED.

Narrative: WE WERE CLRED FOR TKOF AND UPON ADVANCING THROTTLES THE CONFIGN WARNING HORN SOUNDED. CLOSED THROTTLES AND TAXIED CLR OF THE RWY. RECYCLED SPDBRAKE, FLAPS AND TRIM, ALL APPEARED NORMAL. CYCLED THROTTLES AND CONFIGNS WARNING HORN DID NOT SOUND. WE SPECULATED THAT THE SOMEWHAT AFT TRIM SETTING MAY HAVE CAUSED THE HORN. STABILIZER TRIM WAS SET SOMEWHAT AFT AND MAY HAVE CAUSED THE HORN TO SOUND (IT WAS WITHIN THE GREEN BAND BUT AT THE HIGH END OF THE BAND). ACFT SPD WAS LOW, DID NOT EXCEED 10-15 KTS. ALL SYSTEMS CHKED NORMAL. RPTED REASON TO TWR AND PROCEEDED WITH THE FLT.

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.