Narrative:

During departure got a TCASII TA off to our left, 500 ft above us. Quickly idented traffic and told first officer to climb to the right. As I told first officer to climb (increase) and turn, controller said 'level off.' I missed that call and first officer continued to climb and turn right. The turn was slight and we never got off the departure routing or altitude parameters. The traffic was a VFR small aircraft at 8500 ft being controled by ont departure control.

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Original NASA ASRS Text

Title: ALTDEV ALT OVERSHOT AFTER TCASII TA ALERTS FLC OF UNKNOWN VFR TFC IN AREA.

Narrative: DURING DEP GOT A TCASII TA OFF TO OUR L, 500 FT ABOVE US. QUICKLY IDENTED TFC AND TOLD FO TO CLB TO THE R. AS I TOLD FO TO CLB (INCREASE) AND TURN, CTLR SAID 'LEVEL OFF.' I MISSED THAT CALL AND FO CONTINUED TO CLB AND TURN R. THE TURN WAS SLIGHT AND WE NEVER GOT OFF THE DEP ROUTING OR ALT PARAMETERS. THE TFC WAS A VFR SMA AT 8500 FT BEING CTLED BY ONT DEP CTL.

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.