Narrative:

At approximately AB40 I contacted ground control and advised them of my intentions to fly from sck, ca, to cno, ca, and requested flight following to chino, ca, at 9500 ft MSL. Just prior to being clear for takeoff, I advised (again) the tower of my intentions of a left downwind departure, heading 145 degrees, and a climb to 9500 ft MSL. I was advised by the tower to contact stockton approach on 123.85, my transponder is on 1200. After several calls to approach, I was told by sck approach to stand by. At AC03 and 4 DME from sck, and approximately 3800 ft MSL, a commuter airline was descending from my right to my left. At this time I leveled off, and I believe the airline pilot pulled up also. I notified the controller of this near midair. I asked him if he was working the airliner, and asked him for his identify and advised him that I would be making a report on this incident. After I arrived at my destination, cno, I contacted supervisor. He said that the airline was advised of my traffic but did not have me in sight. I did not hear the conversation between the controller and the airline. Supervisor said to me that the controller was using a different frequency. I believe that ground control, the tower, and approach control, and my squawk 1200, were aware of my intentions. I believe that if sck approach control is working the airliner, and the airliner does not have me in sight, an altitude restriction, or a change of heading should have been issued.

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Original NASA ASRS Text

Title: NMAC.

Narrative: AT APPROX AB40 I CONTACTED GND CTL AND ADVISED THEM OF MY INTENTIONS TO FLY FROM SCK, CA, TO CNO, CA, AND REQUESTED FLT FOLLOWING TO CHINO, CA, AT 9500 FT MSL. JUST PRIOR TO BEING CLR FOR TKOF, I ADVISED (AGAIN) THE TWR OF MY INTENTIONS OF A L DOWNWIND DEP, HDG 145 DEGS, AND A CLB TO 9500 FT MSL. I WAS ADVISED BY THE TWR TO CONTACT STOCKTON APCH ON 123.85, MY XPONDER IS ON 1200. AFTER SEVERAL CALLS TO APCH, I WAS TOLD BY SCK APCH TO STAND BY. AT AC03 AND 4 DME FROM SCK, AND APPROX 3800 FT MSL, A COMMUTER AIRLINE WAS DSNDING FROM MY R TO MY L. AT THIS TIME I LEVELED OFF, AND I BELIEVE THE AIRLINE PLT PULLED UP ALSO. I NOTIFIED THE CTLR OF THIS NEAR MIDAIR. I ASKED HIM IF HE WAS WORKING THE AIRLINER, AND ASKED HIM FOR HIS IDENT AND ADVISED HIM THAT I WOULD BE MAKING A RPT ON THIS INCIDENT. AFTER I ARRIVED AT MY DEST, CNO, I CONTACTED SUPVR. HE SAID THAT THE AIRLINE WAS ADVISED OF MY TFC BUT DID NOT HAVE ME IN SIGHT. I DID NOT HEAR THE CONVERSATION BTWN THE CTLR AND THE AIRLINE. SUPVR SAID TO ME THAT THE CTLR WAS USING A DIFFERENT FREQ. I BELIEVE THAT GND CTL, THE TWR, AND APCH CTL, AND MY SQUAWK 1200, WERE AWARE OF MY INTENTIONS. I BELIEVE THAT IF SCK APCH CTL IS WORKING THE AIRLINER, AND THE AIRLINER DOES NOT HAVE ME IN SIGHT, AN ALT RESTRICTION, OR A CHANGE OF HDG SHOULD HAVE BEEN ISSUED.

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.