Narrative:

We approached rdd from the south on a clear day, visibility 60 mi, on an IFR flight plan. At about 15 mi ATC cleared us for the visibility approach and switched us to tower. Tower cleared us for left downwind to runway 16. We entered downwind at 1500' AGL, reported abeam, and were cleared to land following a light aircraft on final. We extended downwind to allow the slower light aircraft time to land. After about 1 mi extension, we turned base and started a descent on normal squared base leg. We started a left turn to final at approximately 2 NM. I made a final clearing check to the right and was startled to see an small aircraft at 1/8 mi distance on a near collision course. I had the controls so I rolled wings level, called the traffic to my pilot, pushed forward on the yoke and passed approximately 100' under the small aircraft. If I had not seen the small aircraft, it would have been a collision or a very, very close miss. The small aircraft did not appear to see us and did not take evasive action. At some distance north of the field. Tower instructed the small aircraft to report a 3 mi final. Subsequently, we reported to tower from the south. He cleared us to a left downwind for runway 16, but the tower did not tell us that another aircraft was approaching from the north. The tower did advise us that a small aircraft was on final, we saw the aircraft on final, judged our turn to base leg so as to have a good interval. On our base leg, the tower became preoccupied with the aircraft just touching down and gave him instructions to exit the runway as soon as possible because we were turning final. The small aircraft acknowledged just as I was turning final at 2 mi. That's when I cleared to the right and saw the small aircraft. He was entering at about a 30 degree entry, wings level.

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Original NASA ASRS Text

Title: NMAC.

Narrative: WE APCHED RDD FROM THE S ON A CLR DAY, VISIBILITY 60 MI, ON AN IFR FLT PLAN. AT ABOUT 15 MI ATC CLRED US FOR THE VIS APCH AND SWITCHED US TO TWR. TWR CLRED US FOR LEFT DOWNWIND TO RWY 16. WE ENTERED DOWNWIND AT 1500' AGL, RPTED ABEAM, AND WERE CLRED TO LAND FOLLOWING A LIGHT ACFT ON FINAL. WE EXTENDED DOWNWIND TO ALLOW THE SLOWER LIGHT ACFT TIME TO LAND. AFTER ABOUT 1 MI EXTENSION, WE TURNED BASE AND STARTED A DSNT ON NORMAL SQUARED BASE LEG. WE STARTED A LEFT TURN TO FINAL AT APPROX 2 NM. I MADE A FINAL CLRING CHK TO THE RIGHT AND WAS STARTLED TO SEE AN SMA AT 1/8 MI DISTANCE ON A NEAR COLLISION COURSE. I HAD THE CTLS SO I ROLLED WINGS LEVEL, CALLED THE TFC TO MY PLT, PUSHED FORWARD ON THE YOKE AND PASSED APPROX 100' UNDER THE SMA. IF I HAD NOT SEEN THE SMA, IT WOULD HAVE BEEN A COLLISION OR A VERY, VERY CLOSE MISS. THE SMA DID NOT APPEAR TO SEE US AND DID NOT TAKE EVASIVE ACTION. AT SOME DISTANCE N OF THE FIELD. TWR INSTRUCTED THE SMA TO RPT A 3 MI FINAL. SUBSEQUENTLY, WE RPTED TO TWR FROM THE S. HE CLRED US TO A LEFT DOWNWIND FOR RWY 16, BUT THE TWR DID NOT TELL US THAT ANOTHER ACFT WAS APCHING FROM THE N. THE TWR DID ADVISE US THAT A SMALL ACFT WAS ON FINAL, WE SAW THE ACFT ON FINAL, JUDGED OUR TURN TO BASE LEG SO AS TO HAVE A GOOD INTERVAL. ON OUR BASE LEG, THE TWR BECAME PREOCCUPIED WITH THE ACFT JUST TOUCHING DOWN AND GAVE HIM INSTRUCTIONS TO EXIT THE RWY ASAP BECAUSE WE WERE TURNING FINAL. THE SMA ACKNOWLEDGED JUST AS I WAS TURNING FINAL AT 2 MI. THAT'S WHEN I CLRED TO THE RIGHT AND SAW THE SMA. HE WAS ENTERING AT ABOUT A 30 DEG ENTRY, WINGS LEVEL.

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.