B777 crew continued takeoff, despite a takeoff warning horn.

Attributes
ACN	497139
Time
Date	200012
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : iad.airport
State Reference	VA
Altitude	agl single value : 0
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B777 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	ground : takeoff roll
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	observation : company check pilot
Qualification	pilot : atp
Experience	flight time type : 1138
ASRS Report	497139
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe non adherence : company policies non adherence : published procedure other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : tkof warn. horn other flight crewa other flight crewb
Resolutory Action	none taken : anomaly accepted
Consequence	other
Supplementary
Problem Areas	Flight Crew Human Performance Aircraft
Primary Problem	Flight Crew Human Performance

Narrative:

While giving an en route check, I observed crew advance power for takeoff and encountering takeoff warning horn with confign gear steering warning annunciation. The captain retarded throttles, idented as confign gear, then advanced power and continued takeoff. Made statement 'warning will go off and out on roll as aircraft straightens out.' warning continued. By the time crew recognized warning would not cease, aircraft was well above 80 KTS and accelerating rapidly. Captain elected to continue takeoff, realizing it might have been a real gear and steering problem. Crew discussed event after airborne, and captain stated during simulator training and on IOE that same warning occurred and instructor and IOE captain instructed to continue and warning would silence on takeoff roll -- that is, unless there is an actual malfunction. On debriefing of flight, crew knew and should have stopped aircraft and in retrospect would have. I believe an improper lack of emphasis on the problem is occurring at the carrier's training center and during line training.

Original NASA ASRS Text

Title: B777 CREW CONTINUED TKOF, DESPITE A TKOF WARNING HORN.

Narrative: WHILE GIVING AN ENRTE CHK, I OBSERVED CREW ADVANCE PWR FOR TKOF AND ENCOUNTERING TKOF WARNING HORN WITH CONFIGN GEAR STEERING WARNING ANNUNCIATION. THE CAPT RETARDED THROTTLES, IDENTED AS CONFIGN GEAR, THEN ADVANCED PWR AND CONTINUED TKOF. MADE STATEMENT 'WARNING WILL GO OFF AND OUT ON ROLL AS ACFT STRAIGHTENS OUT.' WARNING CONTINUED. BY THE TIME CREW RECOGNIZED WARNING WOULD NOT CEASE, ACFT WAS WELL ABOVE 80 KTS AND ACCELERATING RAPIDLY. CAPT ELECTED TO CONTINUE TKOF, REALIZING IT MIGHT HAVE BEEN A REAL GEAR AND STEERING PROB. CREW DISCUSSED EVENT AFTER AIRBORNE, AND CAPT STATED DURING SIMULATOR TRAINING AND ON IOE THAT SAME WARNING OCCURRED AND INSTRUCTOR AND IOE CAPTAIN INSTRUCTED TO CONTINUE AND WARNING WOULD SILENCE ON TKOF ROLL -- THAT IS, UNLESS THERE IS AN ACTUAL MALFUNCTION. ON DEBRIEFING OF FLT, CREW KNEW AND SHOULD HAVE STOPPED ACFT AND IN RETROSPECT WOULD HAVE. I BELIEVE AN IMPROPER LACK OF EMPHASIS ON THE PROB IS OCCURRING AT THE CARRIER'S TRAINING CENTER AND DURING LINE TRAINING.

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.