Narrative:

I wanted to expose the student to the procedures for transiting a TCA, so we called bay approach while still north of the golden gate and received the requested clearance through the TCA, with instructions to stay west and south of the bayshore freeway at 3500'. I handled all of the communications with approach myself. When we were about 2 mi west of sfo, I heard the controller describing as traffic an aircraft which was obviously ours (VFR small aircraft sebnd at 3500'). I didn't catch the other pilot's response. The controller then immediately called us and described 'jet traffic climbing below you at 11 O'clock.' I replied that we were looking. We couldn't find the traffic for several seconds. Then as I looked straight ahead I saw a widebody transport come into view over the top of my cowling, perhaps half a mile away and climbing directly at us. I took evasive action. The widebody transport did not take evasive action and I don't know whether he ever saw us. My best guess is that if I hadn't turned, the widebody transport might have passed 100-200' directly below us. It was definitely a conflict situation. If we had been trimmed in a more nose high attitude or been flying a plane with a more restr view over the cowling, it could have been several additional seconds before we were able to see the traffic, perhaps too late to maneuver. The traffic was unexpected since we were looking directly from the departure end of runways 28 which were being used for arrs only. I gathered from later radio conversations that the airliner had been given a go around, which is why he was headed in our direction. In the circumstance, I would have much preferred that the controller give us a vector rather than a simple traffic call. In the end there was no damage beyond a couple of startled pilots in a little airplane. But, it was as close to a san diego like incident as I ever hope to come.

Related reports:

Google
 

Original NASA ASRS Text

Title: PROBABLE LESS THAN STANDARD SEPARATION BETWEEN GA-SMA AND ACR-WDB ON MISSED APCH.

Narrative: I WANTED TO EXPOSE THE STUDENT TO THE PROCS FOR TRANSITING A TCA, SO WE CALLED BAY APCH WHILE STILL N OF THE GOLDEN GATE AND RECEIVED THE REQUESTED CLRNC THROUGH THE TCA, WITH INSTRUCTIONS TO STAY W AND S OF THE BAYSHORE FREEWAY AT 3500'. I HANDLED ALL OF THE COMS WITH APCH MYSELF. WHEN WE WERE ABOUT 2 MI W OF SFO, I HEARD THE CTLR DESCRIBING AS TFC AN ACFT WHICH WAS OBVIOUSLY OURS (VFR SMA SEBND AT 3500'). I DIDN'T CATCH THE OTHER PLT'S RESPONSE. THE CTLR THEN IMMEDIATELY CALLED US AND DESCRIBED 'JET TFC CLBING BELOW YOU AT 11 O'CLOCK.' I REPLIED THAT WE WERE LOOKING. WE COULDN'T FIND THE TFC FOR SEVERAL SECS. THEN AS I LOOKED STRAIGHT AHEAD I SAW A WDB COME INTO VIEW OVER THE TOP OF MY COWLING, PERHAPS HALF A MILE AWAY AND CLBING DIRECTLY AT US. I TOOK EVASIVE ACTION. THE WDB DID NOT TAKE EVASIVE ACTION AND I DON'T KNOW WHETHER HE EVER SAW US. MY BEST GUESS IS THAT IF I HADN'T TURNED, THE WDB MIGHT HAVE PASSED 100-200' DIRECTLY BELOW US. IT WAS DEFINITELY A CONFLICT SITUATION. IF WE HAD BEEN TRIMMED IN A MORE NOSE HIGH ATTITUDE OR BEEN FLYING A PLANE WITH A MORE RESTR VIEW OVER THE COWLING, IT COULD HAVE BEEN SEVERAL ADDITIONAL SECONDS BEFORE WE WERE ABLE TO SEE THE TFC, PERHAPS TOO LATE TO MANEUVER. THE TFC WAS UNEXPECTED SINCE WE WERE LOOKING DIRECTLY FROM THE DEP END OF RWYS 28 WHICH WERE BEING USED FOR ARRS ONLY. I GATHERED FROM LATER RADIO CONVERSATIONS THAT THE AIRLINER HAD BEEN GIVEN A GO AROUND, WHICH IS WHY HE WAS HEADED IN OUR DIRECTION. IN THE CIRCUMSTANCE, I WOULD HAVE MUCH PREFERRED THAT THE CTLR GIVE US A VECTOR RATHER THAN A SIMPLE TFC CALL. IN THE END THERE WAS NO DAMAGE BEYOND A COUPLE OF STARTLED PLTS IN A LITTLE AIRPLANE. BUT, IT WAS AS CLOSE TO A SAN DIEGO LIKE INCIDENT AS I EVER HOPE TO COME.

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.