Narrative:

I was on an IFR flight in my mooney. Approach xferred me to tower 10 mi out. I continued on the IFR flight plan (I did not cancel) through landing. I contacted ugn tower with the airport in sight and ugn tower instructed me to report 3 mi right base for the visual for runway 3. My recollection is that tower reported a cessna on right downwind for runway 3 and within a min or two, a cessna reported right base for runway. Ugn tower also reported a baron on approximately 3 mi final for runway 3. I was looking for visual on the cessna and at 4.5 mi (GPS) asked for the cessna position then reported 3 mi right base. The cessna reported that I had flown over the top of him, which must have been at approximately 3-4.5 mi right base. I was in a descent to pattern altitude and was within approximately 300 ft of pattern altitude at that time. Ugn tower reported that I would be #2 behind the barron on a 1 mi final. I asked tower for position on the barron and believe tower indicated a 1 mi final. I was at that time (based on review of my GPS track) 0.8 mi from the 1 mi runway 3 final point, still had no visual, so I initiated a left turn and informed ugn tower that I didn't have the barron and was turning left for clearance and again asked for the barron's position. I then got visual on the barron, reported the visual to tower and turned on final with clearance to land from the tower, and landed approximately 0.5 mi behind the barron. I think the ugn tower, controller was unfamiliar with the various airplane's speeds and did not provide adequate separation. After my second request for the current position of the barron, the controller mentioned that if I had slowed down I would have seen him. Before the 4.5 mi right base point, I had my speed brakes out to reduce speed in the descent which is about all I could do until reaching pattern altitude and further reducing to gear extension speed. I still don't know why the cessna was out at the 3 mi base point given the report of downwind and then 'right base.' I never saw the cessna, but if he saw me go 'over the top' at the 3-4 mi right base and if he was at pattern altitude, I must have only been 200-300 ft above.

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Original NASA ASRS Text

Title: M20 PLT HAS A CONFLICT WITH C172 WHILE ENTERING THE PATTERN UNDER LCL CTL AT UGN REGIONAL ARPT.

Narrative: I WAS ON AN IFR FLT IN MY MOONEY. APCH XFERRED ME TO TWR 10 MI OUT. I CONTINUED ON THE IFR FLT PLAN (I DID NOT CANCEL) THROUGH LNDG. I CONTACTED UGN TWR WITH THE ARPT IN SIGHT AND UGN TWR INSTRUCTED ME TO RPT 3 MI R BASE FOR THE VISUAL FOR RWY 3. MY RECOLLECTION IS THAT TWR RPTED A CESSNA ON R DOWNWIND FOR RWY 3 AND WITHIN A MIN OR TWO, A CESSNA RPTED R BASE FOR RWY. UGN TWR ALSO RPTED A BARON ON APPROX 3 MI FINAL FOR RWY 3. I WAS LOOKING FOR VISUAL ON THE CESSNA AND AT 4.5 MI (GPS) ASKED FOR THE CESSNA POS THEN RPTED 3 MI R BASE. THE CESSNA RPTED THAT I HAD FLOWN OVER THE TOP OF HIM, WHICH MUST HAVE BEEN AT APPROX 3-4.5 MI R BASE. I WAS IN A DSCNT TO PATTERN ALT AND WAS WITHIN APPROX 300 FT OF PATTERN ALT AT THAT TIME. UGN TWR RPTED THAT I WOULD BE #2 BEHIND THE BARRON ON A 1 MI FINAL. I ASKED TWR FOR POS ON THE BARRON AND BELIEVE TWR INDICATED A 1 MI FINAL. I WAS AT THAT TIME (BASED ON REVIEW OF MY GPS TRACK) 0.8 MI FROM THE 1 MI RWY 3 FINAL POINT, STILL HAD NO VISUAL, SO I INITIATED A L TURN AND INFORMED UGN TWR THAT I DIDN'T HAVE THE BARRON AND WAS TURNING L FOR CLRNC AND AGAIN ASKED FOR THE BARRON'S POS. I THEN GOT VISUAL ON THE BARRON, RPTED THE VISUAL TO TWR AND TURNED ON FINAL WITH CLRNC TO LAND FROM THE TWR, AND LANDED APPROX 0.5 MI BEHIND THE BARRON. I THINK THE UGN TWR, CTLR WAS UNFAMILIAR WITH THE VARIOUS AIRPLANE'S SPDS AND DID NOT PROVIDE ADEQUATE SEPARATION. AFTER MY SECOND REQUEST FOR THE CURRENT POS OF THE BARRON, THE CTLR MENTIONED THAT IF I HAD SLOWED DOWN I WOULD HAVE SEEN HIM. BEFORE THE 4.5 MI R BASE POINT, I HAD MY SPD BRAKES OUT TO REDUCE SPD IN THE DSCNT WHICH IS ABOUT ALL I COULD DO UNTIL REACHING PATTERN ALT AND FURTHER REDUCING TO GEAR EXTENSION SPD. I STILL DON'T KNOW WHY THE CESSNA WAS OUT AT THE 3 MI BASE POINT GIVEN THE RPT OF DOWNWIND AND THEN 'R BASE.' I NEVER SAW THE CESSNA, BUT IF HE SAW ME GO 'OVER THE TOP' AT THE 3-4 MI R BASE AND IF HE WAS AT PATTERN ALT, I MUST HAVE ONLY BEEN 200-300 FT ABOVE.

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.