<< >> NASA ASRS Report 466361, March 2000

A B727 flight crew receives a takeoff warning horn during power advancement. After recycling flaps, the warning is nullified. Atl, GA.

Attributes
ACN	466361
Time
Date	200003
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : atl.airport
State Reference	GA
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	ground : position and hold
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 9000 flight time type : 2600
ASRS Report	466361
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : atp pilot : instrument pilot : commercial
Experience	flight time last 90 days : 160 flight time total : 6666 flight time type : 3666
ASRS Report	466110
Events
Anomaly	aircraft equipment problem : less severe non adherence : company policies non adherence : far
Independent Detector	aircraft equipment other aircraft equipment : tkof warning sys. other flight crewa
Resolutory Action	flight crew : overcame equipment problem
Consequence	other
Supplementary
Problem Areas	Maintenance Human Performance Aircraft Environmental Factor Flight Crew Human Performance
Primary Problem	Aircraft

Narrative:

On takeoff roll, advanced power to 1.4 EPR and takeoff warning horn sounded. Retarded throttles, checked position of stabilizer, flaps and speed brake. Readvanced throttles to 1.4 EPR and takeoff warning horn resounded. Discontinued takeoff and cleared runway. On taxiway, recycled flaps, readvanced power to 1.4 EPR -- no horn. Recycled flaps, again advanced power to 14. EPR -- no horn. Contacted maintenance coordinator who ok'ed continued flight and advised no write-up necessary. Coordinated with atl ground and tower. Departed on runway 27L. Flew safely and uneventfully to tulsa. At no time while troubleshooting this problem was power advanced beyond 1.4 EPR, well below takeoff thrust. Supplemental information from acn 466110: the takeoff warning horn sounded before aircraft moved. This was not a rejected takeoff because takeoff power was not reached.

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Original NASA ASRS Text

Title: A B727 FLC RECEIVES A TKOF WARNING HORN DURING PWR ADVANCEMENT. AFTER RECYCLING FLAPS, THE WARNING IS NULLIFIED. ATL, GA.

Narrative: ON TKOF ROLL, ADVANCED PWR TO 1.4 EPR AND TKOF WARNING HORN SOUNDED. RETARDED THROTTLES, CHKED POS OF STABILIZER, FLAPS AND SPD BRAKE. READVANCED THROTTLES TO 1.4 EPR AND TKOF WARNING HORN RESOUNDED. DISCONTINUED TKOF AND CLRED RWY. ON TXWY, RECYCLED FLAPS, READVANCED PWR TO 1.4 EPR -- NO HORN. RECYCLED FLAPS, AGAIN ADVANCED PWR TO 14. EPR -- NO HORN. CONTACTED MAINT COORDINATOR WHO OK'ED CONTINUED FLT AND ADVISED NO WRITE-UP NECESSARY. COORDINATED WITH ATL GND AND TWR. DEPARTED ON RWY 27L. FLEW SAFELY AND UNEVENTFULLY TO TULSA. AT NO TIME WHILE TROUBLESHOOTING THIS PROB WAS PWR ADVANCED BEYOND 1.4 EPR, WELL BELOW TKOF THRUST. SUPPLEMENTAL INFO FROM ACN 466110: THE TKOF WARNING HORN SOUNDED BEFORE ACFT MOVED. THIS WAS NOT A REJECTED TKOF BECAUSE TKOF PWR WAS NOT REACHED.

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.