Narrative:

I entered a left downwind at 800 ft MSL for full-stop landing at venice. I believed I was #3 in traffic, following a piper comanche over the approach end of the runway and a piper seminole on extended final. I announced my presence and intentions on downwind on CTAF and had been listening to reports from the comanche and seminole. When I was again the seminole, I started my turn to base and called base on CTAF. As I started to turn final, I was alerted to cessna traffic by an aircraft waiting to take off. I saw the cessna in my 1 O'clock position, slightly above. I turned right (north) then left (west) and passed beneath and behind the cessna which continued on approach. I went around, parallel to and to the right of runway 13, rejoined traffic, and landed. If the cessna had been reporting as in the aim, I believe the incident would not have happened. Since I had the other 2 airplanes in sight, I did not properly check further out on the final approach for traffic. Extended patterns contribute to this kind of occurrence. My aircraft was a piper warrior, the other, a light-colored, single-engine cessna (152 or 172).

Google
 

Original NASA ASRS Text

Title: NMAC BTWN 2 SMA SEL ACFT, ONE ON FINAL AND THE RPTR TURNING FINAL AT A UNCTLED ARPT.

Narrative: I ENTERED A L DOWNWIND AT 800 FT MSL FOR FULL-STOP LNDG AT VENICE. I BELIEVED I WAS #3 IN TFC, FOLLOWING A PIPER COMANCHE OVER THE APCH END OF THE RWY AND A PIPER SEMINOLE ON EXTENDED FINAL. I ANNOUNCED MY PRESENCE AND INTENTIONS ON DOWNWIND ON CTAF AND HAD BEEN LISTENING TO RPTS FROM THE COMANCHE AND SEMINOLE. WHEN I WAS AGAIN THE SEMINOLE, I STARTED MY TURN TO BASE AND CALLED BASE ON CTAF. AS I STARTED TO TURN FINAL, I WAS ALERTED TO CESSNA TFC BY AN ACFT WAITING TO TAKE OFF. I SAW THE CESSNA IN MY 1 O'CLOCK POS, SLIGHTLY ABOVE. I TURNED R (N) THEN L (W) AND PASSED BENEATH AND BEHIND THE CESSNA WHICH CONTINUED ON APCH. I WENT AROUND, PARALLEL TO AND TO THE R OF RWY 13, REJOINED TFC, AND LANDED. IF THE CESSNA HAD BEEN RPTING AS IN THE AIM, I BELIEVE THE INCIDENT WOULD NOT HAVE HAPPENED. SINCE I HAD THE OTHER 2 AIRPLANES IN SIGHT, I DID NOT PROPERLY CHK FURTHER OUT ON THE FINAL APCH FOR TFC. EXTENDED PATTERNS CONTRIBUTE TO THIS KIND OF OCCURRENCE. MY ACFT WAS A PIPER WARRIOR, THE OTHER, A LIGHT-COLORED, SINGLE-ENG CESSNA (152 OR 172).

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.