NMAC BTWN AN SMA SEL CLBING OUT OF AN UNCTLED ARPT AND A DC9 APCHING TO LAND AT A NEARBY LARGE ARPT. THE SMA 'DOVE' TO GET OUT OF THE FLT PATH OF THE DC9.

Narrative

ON SEP/XX/96; AT APPROX XA25L; I TOOK OFF FROM RWY 3 AT 4B9; AN UNCTLED ARPT. AFTER AN INITIAL CLB OF ABOUT 600 FT; I TURNED 90 DEGS L AND THEN TURNED FURTHER L TO AN APPROX HDG OF 250 DEGS. I WAS CLBING THROUGH AN ALT OF 1400-1500 FT MSL; ABOUT 1.5 MI W OF SIMSBURY ARPT; PERPENDICULAR TO MIDFIELD ON A HDG APPROX 40 DEGS AWAY FROM SIMSBURY'S TFC PATTERN DOWNWIND HDG (210 DEGS). AT THAT POINT; WHILE SCANNING THE HORIZON; I SAW AN AIRLINER AT MY 3 O'CLOCK POS; DSNDING ON A DIRECT COLLISION COURSE WITH MY ACFT. I IMMEDIATELY INITIATED FORWARD STICK AND DOVE MY ACFT. THE AIRLINER PASSED APPROX 100-150 FT OVER ME. TO MY KNOWLEDGE; NO ONE WITNESSED THE INCIDENT. THERE WERE; HOWEVER; WITNESSES WHO OBSERVED THE AIRLINER AFTER IT PASSED ME; PASSING DIRECTLY OVER SIMSBURY ARPT AT; WHAT APPEARED TO BE; PATTERN OR NEAR PATTERN ALT (1200 FT MSL -- 1000 FT AGL) ON ITS WAY TO A LNDG AT BDL. SIMSBURY ARPT IS JUST W OF BDL WHICH HAS CLASS C AIRSPACE. THERE IS A NOTCH IN THE WESTERN QUADRANT OF BDL'S CLASS C AIRSPACE TO ALLOW FOR SIMSBURY'S TFC TO TRANSITION IN AND OUT OF THE ARPT WITH THE BOTTOM OF THE CLASS C AREA BEING 2100 FT MSL. BOTH ARPTS HAVE BEEN IN OP FOR YRS AND I HAVE BEEN FLYING OUT OF SIMSBURY FOR OVER 20 YRS. THIS WAS A HOLIDAY WEEKEND AND THE WX WAS SUPER VFR. THERE WERE MANY PVT ACFT IN AND OUT OF SIMSBURY ALL DAY. I DO NOT UNDERSTAND WHY BRADLEY'S ATC WOULD ALLOW AN AIRLINER TO DSND BELOW THE CLASS C AIRSPACE INTO A SMALL ARPT'S TFC AREA ON A VFR DAY DURING A HOLIDAY WEEKEND OR AT ANY TIME.