Takeoff warning horn induces flight crew to abort takeoff.

Attributes
ACN	207143
Time
Date	199204
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : yyz
State Reference	ON
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : whp
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : takeoff other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 4500 flight time type : 200
ASRS Report	207143
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 80 flight time total : 12800
ASRS Report	206239
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : overcame equipment problem flight crew : rejected takeoff other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation other

Narrative:

After all normal pretkof checklist were completed we were cleared for takeoff. After advancing power to 1/3 EPR for the takeoff, the confign warning warning sounded and indicated that the parking brake was set (we were rolling at this time). The captain aborted and checked brake energy charts for cooling times. We had only achieved taxi speed at abort. On taxiway the captain set brakes with foot pressure and and advanced engines to check indications for repeat occurrence. None was noted. All pretkofs checks were completed and captain elected to takeoff without going back to gate for maintenance check off. Captain determined it was an electrical glitch that could not be duplicated. Takeoff and duration of flight were uneventful with no additional warning indications. Logbook entry was made and phl maintenance dealt with logbook entry.

Original NASA ASRS Text

Title: TKOF WARNING HORN INDUCES FLC TO ABORT TKOF.

Narrative: AFTER ALL NORMAL PRETKOF CHKLIST WERE COMPLETED WE WERE CLRED FOR TKOF. AFTER ADVANCING PWR TO 1/3 EPR FOR THE TKOF, THE CONFIGN WARNING WARNING SOUNDED AND INDICATED THAT THE PARKING BRAKE WAS SET (WE WERE ROLLING AT THIS TIME). THE CAPT ABORTED AND CHKED BRAKE ENERGY CHARTS FOR COOLING TIMES. WE HAD ONLY ACHIEVED TAXI SPD AT ABORT. ON TAXIWAY THE CAPT SET BRAKES WITH FOOT PRESSURE AND AND ADVANCED ENGS TO CHK INDICATIONS FOR REPEAT OCCURRENCE. NONE WAS NOTED. ALL PRETKOFS CHKS WERE COMPLETED AND CAPT ELECTED TO TKOF WITHOUT GOING BACK TO GATE FOR MAINT CHK OFF. CAPT DETERMINED IT WAS AN ELECTRICAL GLITCH THAT COULD NOT BE DUPLICATED. TKOF AND DURATION OF FLT WERE UNEVENTFUL WITH NO ADDITIONAL WARNING INDICATIONS. LOGBOOK ENTRY WAS MADE AND PHL MAINT DEALT WITH LOGBOOK ENTRY.

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.