Flight Crew Rotorcraft; Flight Crew Instrument; Flight Crew Commercial; Flight Crew Flight Instructor
Flight Crew Last 90 Days 17; Flight Crew Total 3049; Flight Crew Type 17
Communication Breakdown; Confusion
ATC Issue All Types; Conflict NMAC; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Separated Traffic; Flight Crew Became Reoriented; Flight Crew Took Evasive Action
Procedure; Human Factors
Prior to entering the traffic pattern at UAO; I could hear over the radio that it would be very busy with all the air traffic and could sense the air traffic controller was not taking his job too serious because he had had a comedic inflection in his voice; which I've never heard any other controller use. I was told to enter left downwind for 'A' taxiway and report when abeam the tower. I entered the left downwind and reported when abeam the tower. Nothing was heard from the controller. After thirty seconds had passed I made another call to the tower and the controller instructed me to pass behind the traffic that was on right base for Runway 35. During the downwind approach I got multiple 'Traffic' advisories. This became a distraction and I reported back that I had the traffic on final in sight because I had been focused on that aircraft. This was not the correct aircraft that I was supposed to pass behind and my transmission was not corrected for by the controller so I turned for left base. As I'm turning I am getting another 'Traffic' annunciation and look out my right door. Down below I see Aircraft Y 500 feet under me. By the time the controller comes up on the radio and questions my intentions it is already too late. Luckily the Cessna saw me and began descending or else we would have been a much closer incident. I maintained my altitude and requested a descending right 360 because I had overshot 'A' taxiway. This in turn caused a fixed wing that was departing to the south from the right downwind to make a left 360 to avoid me. I proceeded down to the taxiway to park on the company ramp. I should have not got so caught up on the aircraft on final that caused me to not read back the proper clearance back to the tower. I was also distracted from the multiple 'Traffic' annunciations while I was trying to locate where these aircraft were in particular. I feel that had the controller also done his part in correcting my incorrect read back that the situation could have easily been avoided.
Pilot reported misidentifying an aircraft while on approach to landing and caused another aircraft to take evasive action to avoid a mid air collision.