Captain ignores late occurring takeoff confign warning horn and continues takeoff.

Attributes
ACN	687610
Time
Date	200602
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : zzzz.airport
State Reference	FO
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B777-200
Operating Under FAR Part	Part 121
Flight Phase	climbout : takeoff
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : relief pilot
Experience	flight time last 90 days : 240 flight time total : 16000 flight time type : 6000
ASRS Report	687610
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : config warning horn other flight crewa other flight crewb
Resolutory Action	none taken : anomaly accepted other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

On takeoff with a hefty crosswind after captain was cleared for takeoff and rolling aircraft was straight on runway; power was applied and after a short time the confign horn sounded; captain assured aircraft was straight down centerline. From my relief pilot position; we were above 80 KTS and captain elected to continue takeoff rather than do a high speed abort. We did not have any directional control problems and warning appeared to be bogus. Non eventful departure and landing back at destination. Status message appeared after takeoff but disappeared in-flight.

Original NASA ASRS Text

Title: CAPT IGNORES LATE OCCURRING TKOF CONFIGN WARNING HORN AND CONTINUES TKOF.

Narrative: ON TKOF WITH A HEFTY XWIND AFTER CAPT WAS CLRED FOR TKOF AND ROLLING ACFT WAS STRAIGHT ON RWY; PWR WAS APPLIED AND AFTER A SHORT TIME THE CONFIGN HORN SOUNDED; CAPT ASSURED ACFT WAS STRAIGHT DOWN CTRLINE. FROM MY RELIEF PLT POS; WE WERE ABOVE 80 KTS AND CAPT ELECTED TO CONTINUE TKOF RATHER THAN DO A HIGH SPD ABORT. WE DID NOT HAVE ANY DIRECTIONAL CTL PROBS AND WARNING APPEARED TO BE BOGUS. NON EVENTFUL DEP AND LNDG BACK AT DEST. STATUS MESSAGE APPEARED AFTER TKOF BUT DISAPPEARED INFLT.

Data retrieved from NASA's ASRS site as of January 2009 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.