Narrative:

Takeoff from cdg, first officer, on runway 27 on the NRM08A departure. The autoplt was engaged at 4000 ft MSL and shortly thereafter, the aircraft started a turn to the right (autoplt coupled to GPS) to intercept 331 degree radial of the departure. The GPS was backed up by VOR's information. As the plane started a turn, we went through about 30 degrees of turn to the right, and realized we had not passed the VOR radial. We began a turn back to the left and the TCASII sounded a TA 'traffic, traffic.' the controller asked our heading and we reported turning back left to intercept the course. He then gave us a heading and advised that he had to file a report. To avoid sits such as this, more attention should be emphasized on the STAR/SID with backup from ground stations.

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Original NASA ASRS Text

Title: AN ACR FLC FLYING A DC10-30 FROM CDG, FO, DEVIATED FROM ATC INSTRUCTIONS BY ALLOWING THEIR ACFT TO TURN OFF THE PUBLISHED TRACK.

Narrative: TKOF FROM CDG, FO, ON RWY 27 ON THE NRM08A DEP. THE AUTOPLT WAS ENGAGED AT 4000 FT MSL AND SHORTLY THEREAFTER, THE ACFT STARTED A TURN TO THE R (AUTOPLT COUPLED TO GPS) TO INTERCEPT 331 DEG RADIAL OF THE DEP. THE GPS WAS BACKED UP BY VOR'S INFO. AS THE PLANE STARTED A TURN, WE WENT THROUGH ABOUT 30 DEGS OF TURN TO THE R, AND REALIZED WE HAD NOT PASSED THE VOR RADIAL. WE BEGAN A TURN BACK TO THE L AND THE TCASII SOUNDED A TA 'TFC, TFC.' THE CTLR ASKED OUR HDG AND WE RPTED TURNING BACK L TO INTERCEPT THE COURSE. HE THEN GAVE US A HDG AND ADVISED THAT HE HAD TO FILE A RPT. TO AVOID SITS SUCH AS THIS, MORE ATTN SHOULD BE EMPHASIZED ON THE STAR/SID WITH BACKUP FROM GND STATIONS.

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.