Narrative:

While on climb out from xip approximately 6 mi clear of dtw class B airspace, my aircraft crossed the path of an arriving DC9 landing dtw airport. I was VFR, not on a flight plan, not talking to departure control. DC9 picked my aircraft up on his TCASII. With the rate of climb of my aircraft, his TCASII must have told him to climb to avoid me. However, with my rate of climb, his action of climbing provided a collision course. I only saw the DC9 for a split second and made an attempt to roll right out of his way. He rolled left. In my opinion, had the DC9 continued on his assigned flight path and descending to dtw, there would not have been a near miss. However with the DC9 following the commands of his TCASII, he put the 2 aircraft in the same airspace. Although both aircraft were correct in where they were, DC9 IFR flight plan under approach control to dtw -- lear jet VFR not talking to anyone and both aircraft 5-10 mi from edge of class B airspace. This could be avoided, lear jet could have been talking to departure while VFR and had been advised of traffic, DC9 when in VFR conditions not always follow TCASII. Possible look for other aircraft and avoid other aircraft visually.

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Original NASA ASRS Text

Title: NMAC BTWN A LEAR JET CLBING OUTSIDE THE CLASS B NEARBY AIRSPACE AND A DC9 ON DSCNT INTO THE MAJOR HUB ARPT.

Narrative: WHILE ON CLBOUT FROM XIP APPROX 6 MI CLR OF DTW CLASS B AIRSPACE, MY ACFT CROSSED THE PATH OF AN ARRIVING DC9 LNDG DTW ARPT. I WAS VFR, NOT ON A FLT PLAN, NOT TALKING TO DEP CTL. DC9 PICKED MY ACFT UP ON HIS TCASII. WITH THE RATE OF CLB OF MY ACFT, HIS TCASII MUST HAVE TOLD HIM TO CLB TO AVOID ME. HOWEVER, WITH MY RATE OF CLB, HIS ACTION OF CLBING PROVIDED A COLLISION COURSE. I ONLY SAW THE DC9 FOR A SPLIT SECOND AND MADE AN ATTEMPT TO ROLL RIGHT OUT OF HIS WAY. HE ROLLED L. IN MY OPINION, HAD THE DC9 CONTINUED ON HIS ASSIGNED FLT PATH AND DSNDING TO DTW, THERE WOULD NOT HAVE BEEN A NEAR MISS. HOWEVER WITH THE DC9 FOLLOWING THE COMMANDS OF HIS TCASII, HE PUT THE 2 ACFT IN THE SAME AIRSPACE. ALTHOUGH BOTH ACFT WERE CORRECT IN WHERE THEY WERE, DC9 IFR FLT PLAN UNDER APCH CTL TO DTW -- LEAR JET VFR NOT TALKING TO ANYONE AND BOTH ACFT 5-10 MI FROM EDGE OF CLASS B AIRSPACE. THIS COULD BE AVOIDED, LEAR JET COULD HAVE BEEN TALKING TO DEP WHILE VFR AND HAD BEEN ADVISED OF TFC, DC9 WHEN IN VFR CONDITIONS NOT ALWAYS FOLLOW TCASII. POSSIBLE LOOK FOR OTHER ACFT AND AVOID OTHER ACFT VISUALLY.

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.