Flight crew of medium large transport type aircraft aborted takeoff because of warning horn sounding...

Attributes
ACN	110616
Time
Date	198905
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : eri
State Reference	PA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Phase	climbout : takeoff other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 225 flight time total : 8000
ASRS Report	110616
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	aircraft : equipment problem dissipated flight crew : overcame equipment problem
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Upon being cleared for takeoff the throttles were advanced toward takeoff power setting. This resulted in takeoff warning horn beeping continuously. Power retarded to idle and the takeoff was aborted, maximum speed reaching approximately 50 KTS. We cleared the runway and began to investigate. The flaps were set and indicating in the 1 degree position, the trim was set at approximately 5.0 and was well within the green band, signifying the takeoff trim settings. Speed brake appeared to be in the stowed or down position, and the speed brake armed light was not illuminated, but tested good and worked fine. However, upon repositioning the speed brake handle out of the down position and then returning it to down and subsequently testing the takeoff warning system (by advancing the throttles) the warning horn no longer sounded. Speed brake and speed brake indicator lights tested and operated per normal and a successful takeoff was accomplished. The speed brake had been stowed using the automatic stowing method on the previous landing, ie, pressing the #3 speed brake test button. I believe this did not fully stow the speed brake even though the handle appeared to be and was actually in the down detent.

Original NASA ASRS Text

Title: FLT CREW OF MLG TYPE ACFT ABORTED TKOF BECAUSE OF WARNING HORN SOUNDING.

Narrative: UPON BEING CLRED FOR TKOF THE THROTTLES WERE ADVANCED TOWARD TKOF PWR SETTING. THIS RESULTED IN TKOF WARNING HORN BEEPING CONTINUOUSLY. PWR RETARDED TO IDLE AND THE TKOF WAS ABORTED, MAX SPD REACHING APPROX 50 KTS. WE CLRED THE RWY AND BEGAN TO INVESTIGATE. THE FLAPS WERE SET AND INDICATING IN THE 1 DEG POS, THE TRIM WAS SET AT APPROX 5.0 AND WAS WELL WITHIN THE GREEN BAND, SIGNIFYING THE TKOF TRIM SETTINGS. SPD BRAKE APPEARED TO BE IN THE STOWED OR DOWN POS, AND THE SPD BRAKE ARMED LIGHT WAS NOT ILLUMINATED, BUT TESTED GOOD AND WORKED FINE. HOWEVER, UPON REPOSITIONING THE SPD BRAKE HANDLE OUT OF THE DOWN POS AND THEN RETURNING IT TO DOWN AND SUBSEQUENTLY TESTING THE TKOF WARNING SYS (BY ADVANCING THE THROTTLES) THE WARNING HORN NO LONGER SOUNDED. SPD BRAKE AND SPD BRAKE INDICATOR LIGHTS TESTED AND OPERATED PER NORMAL AND A SUCCESSFUL TKOF WAS ACCOMPLISHED. THE SPD BRAKE HAD BEEN STOWED USING THE AUTOMATIC STOWING METHOD ON THE PREVIOUS LNDG, IE, PRESSING THE #3 SPD BRAKE TEST BUTTON. I BELIEVE THIS DID NOT FULLY STOW THE SPD BRAKE EVEN THOUGH THE HANDLE APPEARED TO BE AND WAS ACTUALLY IN THE DOWN DETENT.

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.