Narrative:

Aircraft was outbound, day-dtw I was flying my scheduled leg and aircraft was climbing out thru 7500', established on V-275, 19.5 DME north of dayton VOR. Weather was basically cavu with a 250 thin overcast with some haze. Dayton departure called and notified us of 'traffic, 10:00 and 2 miles, altitude unknown, northebound' approximately 1 minute and 30 seconds prior to the incident. As our aircraft approached 7600', with a local altimeter of 30.29', I observed an small aircraft converging on us out of our 7:30 position and slightly higher heading approximately 030. I immediately executed a level off while breaking to the right 30 degree. This still put our paths of flight on a converging angle, with what would have appeared to be our left wing striking his underside. At this time the bank angle was increased to 45 degree while descending to 7200'. Throughout this incident, I had my eyes on the small aircraft as did my first officer. I lost sight of him as I started the descent and we overtook the traffic, ahead and to his right. We resumed the climb to 9000' and reported the incident. ATC advised us that traffic was issued to us and I stated we never had acknowledged visual contact. Without any discussion, I concluded a miss of 100 yards and first officer concluded 200' with 100' vertically for each. Passengers were concerned about the abrupt change in course with a few on the left hand side of the aircraft actually seeing the small aircraft. Both of us were being vigilant about watching for traffic even without the traffic call out. The small aircraft was eastbound at the proper altitude and traffic was issued to us. The only point that bothers me is the fact that traffic was issued at 10:00 and two miles, when in fact, the small aircraft was approaching out of my blind spot back at 7:30. The airway (V-275) is defined as the 008 degree radial off of the dayton VOR. I was established on the airway with no wind correction angle being used. I would hate to see general aviation eliminated because of the airline mentality that small airplanes are dangerous. That should never be allowed to happen, but I fail to see how anyone would want to fly around without being mode C equipped.

Related reports:

Google
 

Original NASA ASRS Text

Title: NMAC BETWEEN CLIMBING ACR LTT AND CRUISING GA SMA.

Narrative: ACFT WAS OUTBOUND, DAY-DTW I WAS FLYING MY SCHEDULED LEG AND ACFT WAS CLIMBING OUT THRU 7500', ESTABLISHED ON V-275, 19.5 DME NORTH OF DAYTON VOR. WEATHER WAS BASICALLY CAVU WITH A 250 THIN OVERCAST WITH SOME HAZE. DAYTON DEP CALLED AND NOTIFIED US OF 'TFC, 10:00 AND 2 MILES, ALT UNKNOWN, NORTHEBOUND' APPROX 1 MINUTE AND 30 SECONDS PRIOR TO THE INCIDENT. AS OUR ACFT APCHED 7600', WITH A LOCAL ALTIMETER OF 30.29', I OBSERVED AN SMA CONVERGING ON US OUT OF OUR 7:30 POSITION AND SLIGHTLY HIGHER HEADING APPROX 030. I IMMEDIATELY EXECUTED A LEVEL OFF WHILE BREAKING TO THE RIGHT 30 DEG. THIS STILL PUT OUR PATHS OF FLT ON A CONVERGING ANGLE, WITH WHAT WOULD HAVE APPEARED TO BE OUR LEFT WING STRIKING HIS UNDERSIDE. AT THIS TIME THE BANK ANGLE WAS INCREASED TO 45 DEG WHILE DESCENDING TO 7200'. THROUGHOUT THIS INCIDENT, I HAD MY EYES ON THE SMA AS DID MY FIRST OFFICER. I LOST SIGHT OF HIM AS I STARTED THE DESCENT AND WE OVERTOOK THE TFC, AHEAD AND TO HIS RIGHT. WE RESUMED THE CLIMB TO 9000' AND REPORTED THE INCIDENT. ATC ADVISED US THAT TFC WAS ISSUED TO US AND I STATED WE NEVER HAD ACKNOWLEDGED VISUAL CONTACT. WITHOUT ANY DISCUSSION, I CONCLUDED A MISS OF 100 YARDS AND FIRST OFFICER CONCLUDED 200' WITH 100' VERTICALLY FOR EACH. PASSENGERS WERE CONCERNED ABOUT THE ABRUPT CHANGE IN COURSE WITH A FEW ON THE LEFT HAND SIDE OF THE ACFT ACTUALLY SEEING THE SMA. BOTH OF US WERE BEING VIGILANT ABOUT WATCHING FOR TFC EVEN WITHOUT THE TFC CALL OUT. THE SMA WAS EBOUND AT THE PROPER ALT AND TFC WAS ISSUED TO US. THE ONLY POINT THAT BOTHERS ME IS THE FACT THAT TFC WAS ISSUED AT 10:00 AND TWO MILES, WHEN IN FACT, THE SMA WAS APCHING OUT OF MY BLIND SPOT BACK AT 7:30. THE AIRWAY (V-275) IS DEFINED AS THE 008 DEG RADIAL OFF OF THE DAYTON VOR. I WAS ESTABLISHED ON THE AIRWAY WITH NO WIND CORRECTION ANGLE BEING USED. I WOULD HATE TO SEE GENERAL AVIATION ELIMINATED BECAUSE OF THE AIRLINE MENTALITY THAT SMALL AIRPLANES ARE DANGEROUS. THAT SHOULD NEVER BE ALLOWED TO HAPPEN, BUT I FAIL TO SEE HOW ANYONE WOULD WANT TO FLY AROUND WITHOUT BEING MODE C EQUIPPED.

Data retrieved from NASA's ASRS site as of August 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.