Narrative:

Established on left downwind for runway 10L at pdx. Tower said they would call my turn to left base. Tower called turn to left base, and after turn, asked if I had the airbus in sight that I was to follow. I looked ahead and around and then saw the airbus approaching at about 2 O'clock! My course was taking me right in front of him. I immediately made a sharp right turn back to downwind and passed the airbus a few hundred ft away. As we got close, the airbus pilot came on the air and said he had a traffic alert. Then looked out the window, saw me and said, to the effect, that some small plane was flying right through the landing pattern. I came on and said: no, I was just trying to get behind him to land, which the tower confirmed on the radio. The tower turned me to base for too soon and before I had the airbus in sight. I am concerned that the airbus may file a complaint about a near miss (true), but without understanding the circumstances. Subsequent landing was routine though I had to slow way down to get any reasonable wake turbulence separation.

Google
 

Original NASA ASRS Text

Title: NMAC VFR TFC PATTERN SMALL ACFT TOOK EVASIVE ACTION TO AVOID ACR AIRBUS ON FINAL APCH TO PDX.

Narrative: ESTABLISHED ON L DOWNWIND FOR RWY 10L AT PDX. TWR SAID THEY WOULD CALL MY TURN TO L BASE. TWR CALLED TURN TO L BASE, AND AFTER TURN, ASKED IF I HAD THE AIRBUS IN SIGHT THAT I WAS TO FOLLOW. I LOOKED AHEAD AND AROUND AND THEN SAW THE AIRBUS APCHING AT ABOUT 2 O'CLOCK! MY COURSE WAS TAKING ME RIGHT IN FRONT OF HIM. I IMMEDIATELY MADE A SHARP R TURN BACK TO DOWNWIND AND PASSED THE AIRBUS A FEW HUNDRED FT AWAY. AS WE GOT CLOSE, THE AIRBUS PLT CAME ON THE AIR AND SAID HE HAD A TFC ALERT. THEN LOOKED OUT THE WINDOW, SAW ME AND SAID, TO THE EFFECT, THAT SOME SMALL PLANE WAS FLYING RIGHT THROUGH THE LNDG PATTERN. I CAME ON AND SAID: NO, I WAS JUST TRYING TO GET BEHIND HIM TO LAND, WHICH THE TWR CONFIRMED ON THE RADIO. THE TWR TURNED ME TO BASE FOR TOO SOON AND BEFORE I HAD THE AIRBUS IN SIGHT. I AM CONCERNED THAT THE AIRBUS MAY FILE A COMPLAINT ABOUT A NEAR MISS (TRUE), BUT WITHOUT UNDERSTANDING THE CIRCUMSTANCES. SUBSEQUENT LNDG WAS ROUTINE THOUGH I HAD TO SLOW WAY DOWN TO GET ANY REASONABLE WAKE TURB SEPARATION.

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.