Flight crew of a widebody transport failed to turn as required on departure causing ATC to intervene. Error was caused by the flying first officer not activating the navigation function on the FMS.

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Attributes
ACN	350370
Time
Date	199610
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : cdg
State Reference	FO
Altitude	msl bound lower : 2000 msl bound upper : 2000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : cdg
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	climbout : takeoff
Route In Use	departure other departure sid : sid
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 150 flight time total : 8000 flight time type : 1000
ASRS Report	350370
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	non adherence : published procedure non adherence : clearance other spatial deviation
Independent Detector	other controllera
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

First officer, flying aircraft on automatic FMS departure, failed to engage navigation function for departure and missed turn at one and one half mi. Departure stated we overshot turn by 2 mi. Captain was working radios and missed error. The basic problem is heavy workload on 2-MAN crew on FMS type glass cockpit aircraft. Crew must take extra care to back up all operations.

Original NASA ASRS Text

Title: FLC OF A WDB FAILED TO TURN AS REQUIRED ON DEP CAUSING ATC TO INTERVENE. ERROR WAS CAUSED BY THE FLYING FO NOT ACTIVATING THE NAV FUNCTION ON THE FMS.

Narrative: FO, FLYING ACFT ON AUTOMATIC FMS DEP, FAILED TO ENGAGE NAV FUNCTION FOR DEP AND MISSED TURN AT ONE AND ONE HALF MI. DEP STATED WE OVERSHOT TURN BY 2 MI. CAPT WAS WORKING RADIOS AND MISSED ERROR. THE BASIC PROB IS HVY WORKLOAD ON 2-MAN CREW ON FMS TYPE GLASS COCKPIT ACFT. CREW MUST TAKE EXTRA CARE TO BACK UP ALL OPS.

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.