Narrative:

All checklists were completed, no discrepancies were noticed. Flight was cleared for takeoff on runway 23 at gso. As I advanced the power levers into the takeoff warning area, an intermittent takeoff warning horn was heard. I retarded the power levers to idle and waited for the captain's command. The captain and I both checked the speed brake handle position, flap handle position (as well as the flap gauge indication) and stabilizer trim setting; all were set in their correct takeoff position. The captain advanced the power levers to the takeoff warning check area again, and got the intermittent takeoff warning horn again. The captain then discontinued the takeoff and exited the runway at a convenient turn off. I advised the F/as to remain seated, and gso tower that we were rejecting our takeoff and negative assistance was required. The tower asked us our intentions, and we informed them we'd like to taxi back to the runway. While on the taxiway, I looked outside and visually confirmed that the leading edge devices were extended. I then checked the aft overhead panel and noticed the leading edge devices annunciator panel was not illuminated. I then checked the circuit breaker panel behind my seat and found the 'leading edge flaps position inoperative' circuit breaker was out. Resetting the circuit breaker illuminated both the 'leading edge flaps ext' light and the leading edge devices annunciator panel. Our flight was again cleared for takeoff on runway 23 at gso and this time no takeoff warning horn was heard when the power levers were advanced to the takeoff warning check area. Our flight then proceeded to bwi west/O further incident. In retrospect, I don't know how, when, or why the 'leading edge flap position' circuit breaker popped out. On future flts however, I plan to utilize a more deliberate/pronounced 'check' while completing checklists, and hopefully prevent situations like this from happening again. In this case, the system of having a takeoff warning horn worked as it should have and we were subsequently able to complete our flight safely.

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Original NASA ASRS Text

Title: ACR-MLG GOT TKOF WARNING HORN AS TRUST LEVERS WERE ADVANCED. TKOF ABORT.

Narrative: ALL CHKLISTS WERE COMPLETED, NO DISCREPANCIES WERE NOTICED. FLT WAS CLRED FOR TKOF ON RWY 23 AT GSO. AS I ADVANCED THE PWR LEVERS INTO THE TKOF WARNING AREA, AN INTERMITTENT TKOF WARNING HORN WAS HEARD. I RETARDED THE PWR LEVERS TO IDLE AND WAITED FOR THE CAPT'S COMMAND. THE CAPT AND I BOTH CHKED THE SPD BRAKE HANDLE POS, FLAP HANDLE POS (AS WELL AS THE FLAP GAUGE INDICATION) AND STABILIZER TRIM SETTING; ALL WERE SET IN THEIR CORRECT TKOF POS. THE CAPT ADVANCED THE PWR LEVERS TO THE TKOF WARNING CHK AREA AGAIN, AND GOT THE INTERMITTENT TKOF WARNING HORN AGAIN. THE CAPT THEN DISCONTINUED THE TKOF AND EXITED THE RWY AT A CONVENIENT TURN OFF. I ADVISED THE F/AS TO REMAIN SEATED, AND GSO TWR THAT WE WERE REJECTING OUR TKOF AND NEGATIVE ASSISTANCE WAS REQUIRED. THE TWR ASKED US OUR INTENTIONS, AND WE INFORMED THEM WE'D LIKE TO TAXI BACK TO THE RWY. WHILE ON THE TXWY, I LOOKED OUTSIDE AND VISUALLY CONFIRMED THAT THE LEADING EDGE DEVICES WERE EXTENDED. I THEN CHKED THE AFT OVERHEAD PANEL AND NOTICED THE LEADING EDGE DEVICES ANNUNCIATOR PANEL WAS NOT ILLUMINATED. I THEN CHKED THE CB PANEL BEHIND MY SEAT AND FOUND THE 'LEADING EDGE FLAPS POS INOP' CIRCUIT BREAKER WAS OUT. RESETTING THE CIRCUIT BREAKER ILLUMINATED BOTH THE 'LEADING EDGE FLAPS EXT' LIGHT AND THE LEADING EDGE DEVICES ANNUNCIATOR PANEL. OUR FLT WAS AGAIN CLRED FOR TKOF ON RWY 23 AT GSO AND THIS TIME NO TKOF WARNING HORN WAS HEARD WHEN THE PWR LEVERS WERE ADVANCED TO THE TKOF WARNING CHK AREA. OUR FLT THEN PROCEEDED TO BWI W/O FURTHER INCIDENT. IN RETROSPECT, I DON'T KNOW HOW, WHEN, OR WHY THE 'LEADING EDGE FLAP POS' CIRCUIT BREAKER POPPED OUT. ON FUTURE FLTS HOWEVER, I PLAN TO UTILIZE A MORE DELIBERATE/PRONOUNCED 'CHK' WHILE COMPLETING CHKLISTS, AND HOPEFULLY PREVENT SITUATIONS LIKE THIS FROM HAPPENING AGAIN. IN THIS CASE, THE SYS OF HAVING A TKOF WARNING HORN WORKED AS IT SHOULD HAVE AND WE WERE SUBSEQUENTLY ABLE TO COMPLETE OUR FLT SAFELY.

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.