Narrative:

My aircraft, nxx, was IFR level at 4000 ft, just handed off from atl approach to ZTL. We were with the center for approximately 3 mins when my copilot pushed down on the control wheel and moaned. I looked at him then looked left to see a gray cardinal or C182RG pass at approximately 15 ft off our left side and just over our tail. The other aircraft appeared to be in a slight left turn. I have been flying since 1969. That is the closest I have ever come to being hit by another aircraft. ZTL said they didn't see the other aircraft because of the 'limited radar coverage in that area.' (36 mi north of atlanta at 4000 ft.) supplemental information from acn 383084: I made an evasive maneuver to miss a C210 over the cartersville airport. The C210 aircraft was heading northbound at 4000 ft MSL. ZTL was notified of the situation, their response was the radar coverage in that area was minimal. An uneventful landing was accomplished at rmg, GA.

Google
 

Original NASA ASRS Text

Title: A BE90 HAS AN NMAC WITH A CE182 IN ZTL, GA, AIRSPACE. ZTL STATES THAT RADAR COVERAGE IS MINIMAL IN THAT AREA.

Narrative: MY ACFT, NXX, WAS IFR LEVEL AT 4000 FT, JUST HANDED OFF FROM ATL APCH TO ZTL. WE WERE WITH THE CTR FOR APPROX 3 MINS WHEN MY COPLT PUSHED DOWN ON THE CTL WHEEL AND MOANED. I LOOKED AT HIM THEN LOOKED L TO SEE A GRAY CARDINAL OR C182RG PASS AT APPROX 15 FT OFF OUR L SIDE AND JUST OVER OUR TAIL. THE OTHER ACFT APPEARED TO BE IN A SLIGHT L TURN. I HAVE BEEN FLYING SINCE 1969. THAT IS THE CLOSEST I HAVE EVER COME TO BEING HIT BY ANOTHER ACFT. ZTL SAID THEY DIDN'T SEE THE OTHER ACFT BECAUSE OF THE 'LIMITED RADAR COVERAGE IN THAT AREA.' (36 MI N OF ATLANTA AT 4000 FT.) SUPPLEMENTAL INFO FROM ACN 383084: I MADE AN EVASIVE MANEUVER TO MISS A C210 OVER THE CARTERSVILLE ARPT. THE C210 ACFT WAS HDG NBOUND AT 4000 FT MSL. ZTL WAS NOTIFIED OF THE SIT, THEIR RESPONSE WAS THE RADAR COVERAGE IN THAT AREA WAS MINIMAL. AN UNEVENTFUL LNDG WAS ACCOMPLISHED AT RMG, GA.

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.