Narrative:

I was leveling off from a climb at 4000 ft 4 mi south of travis AFB, ca. I leaned forward to click on the autoplt when a king air 300 appeared in my 3 O'clock about 50 ft away. The king air was at the same altitude but done underneath me in a left hand turn. The king air was definitely in cruise flight. The rule is 'see and avoid' but he came at me under my right wing and was out of my sight. I guess he saw me because he did barely miss me as he went over. We were over travis' alert area at the time. To prevent this: well, I've had this problem before. It's an FBO trainer at napa airport. They tend to fly their bonanzas and king airs through a highly busy practice area for concord buchanan field (ca). I think what could have helped if FBO would either avoid the practice area or fly above it. If the king air was on flight following from travis should have issued a traffic alert. Callback conversation with reporter revealed the following information: reporter states he was not yet in contact with travis as he had just departed buchanan airport and was about to switch frequencys. When he did make contact the other aircraft was long gone so he did not query the controller.

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Original NASA ASRS Text

Title: SMA HAS NMAC WITH SMT.

Narrative: I WAS LEVELING OFF FROM A CLB AT 4000 FT 4 MI S OF TRAVIS AFB, CA. I LEANED FORWARD TO CLICK ON THE AUTOPLT WHEN A KING AIR 300 APPEARED IN MY 3 O'CLOCK ABOUT 50 FT AWAY. THE KING AIR WAS AT THE SAME ALT BUT DONE UNDERNEATH ME IN A L HAND TURN. THE KING AIR WAS DEFINITELY IN CRUISE FLT. THE RULE IS 'SEE AND AVOID' BUT HE CAME AT ME UNDER MY R WING AND WAS OUT OF MY SIGHT. I GUESS HE SAW ME BECAUSE HE DID BARELY MISS ME AS HE WENT OVER. WE WERE OVER TRAVIS' ALERT AREA AT THE TIME. TO PREVENT THIS: WELL, I'VE HAD THIS PROB BEFORE. IT'S AN FBO TRAINER AT NAPA ARPT. THEY TEND TO FLY THEIR BONANZAS AND KING AIRS THROUGH A HIGHLY BUSY PRACTICE AREA FOR CONCORD BUCHANAN FIELD (CA). I THINK WHAT COULD HAVE HELPED IF FBO WOULD EITHER AVOID THE PRACTICE AREA OR FLY ABOVE IT. IF THE KING AIR WAS ON FLT FOLLOWING FROM TRAVIS SHOULD HAVE ISSUED A TFC ALERT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATES HE WAS NOT YET IN CONTACT WITH TRAVIS AS HE HAD JUST DEPARTED BUCHANAN ARPT AND WAS ABOUT TO SWITCH FREQS. WHEN HE DID MAKE CONTACT THE OTHER ACFT WAS LONG GONE SO HE DID NOT QUERY THE CTLR.

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.