Narrative:

We were cleared for takeoff, runway heading and 4000 ft. After contacting departure control, we were given a 270 degree heading. In the turn, ATC asked us if we were leveling at 4000 ft. The captain saw traffic and gestured for me to stop turning, which I did (approximately 330 degree heading) and cleared traffic. ATC asked us if we were ok and if tower assigned 3000 ft on takeoff. None of the 3 pilots on board heard anything but 4000 ft. An RA was given at approximately 3500 ft (traffic) 'monitor climb, climb, clear of conflict' -- all by the time I hit 4000 ft. TCASII helped in locating traffic but avoidance was achieved quicker by stopping the turn.

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Original NASA ASRS Text

Title: A B727 FLT OVERSHOOTS ITS ASSIGNED ALT DURING DEP TURN AND HAS AN ENCOUNTER WITH INBOUND TFC AT 4000 FT NW OF ORF, VA.

Narrative: WE WERE CLRED FOR TKOF, RWY HDG AND 4000 FT. AFTER CONTACTING DEP CTL, WE WERE GIVEN A 270 DEG HDG. IN THE TURN, ATC ASKED US IF WE WERE LEVELING AT 4000 FT. THE CAPT SAW TFC AND GESTURED FOR ME TO STOP TURNING, WHICH I DID (APPROX 330 DEG HDG) AND CLRED TFC. ATC ASKED US IF WE WERE OK AND IF TWR ASSIGNED 3000 FT ON TKOF. NONE OF THE 3 PLTS ON BOARD HEARD ANYTHING BUT 4000 FT. AN RA WAS GIVEN AT APPROX 3500 FT (TFC) 'MONITOR CLB, CLB, CLR OF CONFLICT' -- ALL BY THE TIME I HIT 4000 FT. TCASII HELPED IN LOCATING TFC BUT AVOIDANCE WAS ACHIEVED QUICKER BY STOPPING THE TURN.

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.