A cessna experienced an near midair collision with a cessna 150 in the pattern at bdn.

Attributes
ACN	771105
Time
Date	200801
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : bdn.airport
State Reference	OR
Altitude	agl single value : 300 msl single value : 1500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Cessna Aircraft Undifferentiated or Other Model
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Route In Use	approach : traffic pattern
Flight Plan	None
Aircraft 2
Operator	general aviation : personal
Make Model Name	Cessna 150
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Route In Use	approach : traffic pattern
Person 1
Function	flight crew : single pilot
Qualification	pilot : commercial pilot : multi engine pilot : private pilot : cfi
Experience	flight time last 90 days : 90 flight time total : 2500 flight time type : 1000
ASRS Report	771105
Events
Anomaly	conflict : nmac non adherence : published procedure
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Miss Distance	horizontal : 0 vertical : 50
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

Bend is an uncontrolled airport and there were approximately 6 airplanes in the pattern with a mix of training aircraft and high performance aircraft. Additionally; at the same time; 2 aircraft were on frequency announcing their pattern entry and position at a neighboring airport. As I tried to enter the downwind on the 45; it was too congested and I did 2 360's for spacing. On the third attempt; it seemed that there would be an opening; so I slowed to 100 KTS with full flaps and proceeded onto the downwind. It appeared that the other slower training aircraft were on the radio trying to figure where they were in relationship to each other ahead of me. Two of them broke out of the pattern. At that point; believing that there was no one in front of me or that they were further into the base/final area and knowing that I had an aircraft on upwind approaching crosswind; I accelerated to normal pattern speed with partially retracted flaps. I made all normal position calls on downwind; base and final. I did not hear any other calls from anyone in the pattern ahead of me and I did not hear any indication of possible interference from a 'steeped on' call. As I was abeam the numbers on downwind; I extended full flaps and began to slow. At the 45 to the numbers; I turned base. Turning final; establishing a slow test 72 KT approach with no power; I thought that I glimpsed motion. I lowered the nose and saw the wing of the C150 immediately below me. I immediately applied full power and pulled the stick to the buffet and initiated a climbing left turn. I offset to the left; reoriented myself in the pattern for spacing; and returned for landing. On the ground after landing; I spoke to the other pilot. He was not aware of a near miss. Other pilots in the air at the time suggested that they thought that the C150 had performed an extended base entry into the pattern. And no one was certain that they heard him make any clear radio calls. I verified that he was on the correct frequency. Although it was daylight; it was late in the afternoon. The WX was clear with unrestr ceiling and visibility.

Original NASA ASRS Text

Title: A CESSNA EXPERIENCED AN NMAC WITH A CESSNA 150 IN THE PATTERN AT BDN.

Narrative: BEND IS AN UNCTLED ARPT AND THERE WERE APPROX 6 AIRPLANES IN THE PATTERN WITH A MIX OF TRAINING ACFT AND HIGH PERFORMANCE ACFT. ADDITIONALLY; AT THE SAME TIME; 2 ACFT WERE ON FREQ ANNOUNCING THEIR PATTERN ENTRY AND POS AT A NEIGHBORING ARPT. AS I TRIED TO ENTER THE DOWNWIND ON THE 45; IT WAS TOO CONGESTED AND I DID 2 360'S FOR SPACING. ON THE THIRD ATTEMPT; IT SEEMED THAT THERE WOULD BE AN OPENING; SO I SLOWED TO 100 KTS WITH FULL FLAPS AND PROCEEDED ONTO THE DOWNWIND. IT APPEARED THAT THE OTHER SLOWER TRAINING ACFT WERE ON THE RADIO TRYING TO FIGURE WHERE THEY WERE IN RELATIONSHIP TO EACH OTHER AHEAD OF ME. TWO OF THEM BROKE OUT OF THE PATTERN. AT THAT POINT; BELIEVING THAT THERE WAS NO ONE IN FRONT OF ME OR THAT THEY WERE FURTHER INTO THE BASE/FINAL AREA AND KNOWING THAT I HAD AN ACFT ON UPWIND APCHING XWIND; I ACCELERATED TO NORMAL PATTERN SPD WITH PARTIALLY RETRACTED FLAPS. I MADE ALL NORMAL POS CALLS ON DOWNWIND; BASE AND FINAL. I DID NOT HEAR ANY OTHER CALLS FROM ANYONE IN THE PATTERN AHEAD OF ME AND I DID NOT HEAR ANY INDICATION OF POSSIBLE INTERFERENCE FROM A 'STEEPED ON' CALL. AS I WAS ABEAM THE NUMBERS ON DOWNWIND; I EXTENDED FULL FLAPS AND BEGAN TO SLOW. AT THE 45 TO THE NUMBERS; I TURNED BASE. TURNING FINAL; ESTABLISHING A SLOW TEST 72 KT APCH WITH NO PWR; I THOUGHT THAT I GLIMPSED MOTION. I LOWERED THE NOSE AND SAW THE WING OF THE C150 IMMEDIATELY BELOW ME. I IMMEDIATELY APPLIED FULL PWR AND PULLED THE STICK TO THE BUFFET AND INITIATED A CLBING L TURN. I OFFSET TO THE L; REORIENTED MYSELF IN THE PATTERN FOR SPACING; AND RETURNED FOR LNDG. ON THE GND AFTER LNDG; I SPOKE TO THE OTHER PLT. HE WAS NOT AWARE OF A NEAR MISS. OTHER PLTS IN THE AIR AT THE TIME SUGGESTED THAT THEY THOUGHT THAT THE C150 HAD PERFORMED AN EXTENDED BASE ENTRY INTO THE PATTERN. AND NO ONE WAS CERTAIN THAT THEY HEARD HIM MAKE ANY CLR RADIO CALLS. I VERIFIED THAT HE WAS ON THE CORRECT FREQ. ALTHOUGH IT WAS DAYLIGHT; IT WAS LATE IN THE AFTERNOON. THE WX WAS CLR WITH UNRESTR CEILING AND VISIBILITY.

Data retrieved from NASA's ASRS site as of May 2009 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.