Narrative:

All sids from cdg have you track a radial that corresponds to the runway magnetic heading. Taxi clearance was to runway 10, maintain runway heading to 4000 ft, vectors to eux. Tower clearance was fly runway heading 4000 ft, vectors eux. Wind at takeoff was 170/22 gusts 30, strong right crosswind. On climb out we heard departure control give another aircraft an 'immediate' turn to 360 degrees. When that aircraft (after he turned) asked why, he was told a widebody transport had drifted into his runway 9 departure path. After that, the de gaulle departure told us we should be tracking runway centerline, that we had entered runway 9 space. Moments later, he told another flight behind us the same thing. That flight's response was 'the clearance was runway heading and I'm heading 088 degrees, runway heading.' no more comments from departure control. I think there might have been a breakdown in communication between ground/tower and departure control as to what our clearance was. Departure expected us to track 088 degrees like the sids and was unaware of the runway heading clearance or ground/tower was not aware that the use of the phrase 'fly' or 'maintain' runway heading is not a tracking clearance. On parallel runways, if the downwind aircraft is tracking and the upwind aircraft is heading, in a strong crosswind, a conflict will result. All aircraft were doing their proper clearance. This was an ATC breakdown.

Related reports:

Google
 

Original NASA ASRS Text

Title: AN ACR WDB CAPT STATES THAT HIS ACFT, FLYING RWY HDG, GOT CLOSE WITH ANOTHER ACFT FLYING RWY TRACK AFTER TKOF.

Narrative: ALL SIDS FROM CDG HAVE YOU TRACK A RADIAL THAT CORRESPONDS TO THE RWY MAGNETIC HDG. TAXI CLRNC WAS TO RWY 10, MAINTAIN RWY HDG TO 4000 FT, VECTORS TO EUX. TWR CLRNC WAS FLY RWY HDG 4000 FT, VECTORS EUX. WIND AT TKOF WAS 170/22 GUSTS 30, STRONG R XWIND. ON CLBOUT WE HEARD DEP CTL GIVE ANOTHER ACFT AN 'IMMEDIATE' TURN TO 360 DEGS. WHEN THAT ACFT (AFTER HE TURNED) ASKED WHY, HE WAS TOLD A WDB HAD DRIFTED INTO HIS RWY 9 DEP PATH. AFTER THAT, THE DE GAULLE DEP TOLD US WE SHOULD BE TRACKING RWY CTRLINE, THAT WE HAD ENTERED RWY 9 SPACE. MOMENTS LATER, HE TOLD ANOTHER FLT BEHIND US THE SAME THING. THAT FLT'S RESPONSE WAS 'THE CLRNC WAS RWY HDG AND I'M HDG 088 DEGS, RWY HDG.' NO MORE COMMENTS FROM DEP CTL. I THINK THERE MIGHT HAVE BEEN A BREAKDOWN IN COM BTWN GND/TWR AND DEP CTL AS TO WHAT OUR CLRNC WAS. DEP EXPECTED US TO TRACK 088 DEGS LIKE THE SIDS AND WAS UNAWARE OF THE RWY HDG CLRNC OR GND/TWR WAS NOT AWARE THAT THE USE OF THE PHRASE 'FLY' OR 'MAINTAIN' RWY HDG IS NOT A TRACKING CLRNC. ON PARALLEL RWYS, IF THE DOWNWIND ACFT IS TRACKING AND THE UPWIND ACFT IS HDG, IN A STRONG XWIND, A CONFLICT WILL RESULT. ALL ACFT WERE DOING THEIR PROPER CLRNC. THIS WAS AN ATC BREAKDOWN.

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.