Narrative:

I was the PNF on flight sjc to den. We were cleared the loupe 9 departure off runway 30L. We fully briefed the departure to include turn restrs and the planned use of LNAV and VNAV. At 400 ft the first officer requested LNAV, which I selected. At the same time I was told to contact departure. Instead of continuing on runway heading until 1.8 DME, the first officer started the turn immediately, although the flight director was commanding straight ahead. I noticed the deviation as we were rolling through approximately a 360 degree heading and told him to roll out. At the same time, departure control told us to stop the climb at 2000 ft for VFR traffic at 2500 ft. The first officer had the traffic in sight and I told departure. We were then cleared to our original altitude of 4000 ft. Human factors involved were the usual busy atmosphere of takeoff and departure. Also the first officer told me he fixated on the requirement to complete the turn prior to 4 DME and forgot about the runway heading to 1.8 DME.

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Original NASA ASRS Text

Title: A300 CREW STARTED DEP TURN PREMATURELY, BEFORE SID RESTR.

Narrative: I WAS THE PNF ON FLT SJC TO DEN. WE WERE CLRED THE LOUPE 9 DEP OFF RWY 30L. WE FULLY BRIEFED THE DEP TO INCLUDE TURN RESTRS AND THE PLANNED USE OF LNAV AND VNAV. AT 400 FT THE FO REQUESTED LNAV, WHICH I SELECTED. AT THE SAME TIME I WAS TOLD TO CONTACT DEP. INSTEAD OF CONTINUING ON RWY HDG UNTIL 1.8 DME, THE FO STARTED THE TURN IMMEDIATELY, ALTHOUGH THE FLT DIRECTOR WAS COMMANDING STRAIGHT AHEAD. I NOTICED THE DEV AS WE WERE ROLLING THROUGH APPROX A 360 DEG HDG AND TOLD HIM TO ROLL OUT. AT THE SAME TIME, DEP CTL TOLD US TO STOP THE CLB AT 2000 FT FOR VFR TFC AT 2500 FT. THE FO HAD THE TFC IN SIGHT AND I TOLD DEP. WE WERE THEN CLRED TO OUR ORIGINAL ALT OF 4000 FT. HUMAN FACTORS INVOLVED WERE THE USUAL BUSY ATMOSPHERE OF TKOF AND DEP. ALSO THE FO TOLD ME HE FIXATED ON THE REQUIREMENT TO COMPLETE THE TURN PRIOR TO 4 DME AND FORGOT ABOUT THE RWY HDG TO 1.8 DME.

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.