Date: 202107
Local time of day: 0601-1200
Location: D01.TRACON, CO
Flight conditions: VMC
Weather elements / visibility: 10
Light: Daylight
Aircraft: Small Aircraft; High Wing; 1 Eng; Fixed Gear
Operator: Personal
Operating under: Part 91
Flight plan: None
Mission: Personal
Flight phase: Final Approach
Airspace: Class G LMO
Second aircraft: Small Aircraft; Low Wing; 1 Eng; Fixed Gear
Reporter organization: Personal
Reporter function: Single Pilot
Reporter qualification: Flight Crew Private
Human factors: Communication Breakdown
Anomaly: Conflict NMAC; Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Published Material / Policy
Detector: Person Flight Crew
When detected: In-flight
Result: Flight Crew Took Evasive Action
Contributing factors: Human Factors; Procedure
Primary problem: Human Factors

Narrative: An aircraft in crosswind for Runway 29. Aircraft Z is 4 NM to the South West 1;000 feet above pattern altitude; announcing intentions to enter the downwind. My aircraft (Aircraft X) is 2 miles to the south at pattern altitude; announcing intentions to enter on the 45 for midfield downwind [Runway] 29; have the crosswind and 4 mile traffic insight. I announce to the now downwind traffic that I have them insight and will sequence behind them at the midfield downwind Runway 29. Aircraft Y departs Runway 29 and announces crosswind to perform touch and goes on Runway 29 (CFI and student). Aircraft Z announces performing a 360 for spacing. I believe that Aircraft Z was facing away from the field and did not see Aircraft Y in crosswind. I hear a radio call that Aircraft Z has cut off Aircraft Y; I look at my MFD and see the two aircraft appear very close to each other. The CFI in Aircraft Y announces that they will be performing a 360 for spacing behind the 'cutting aircraft'. I am closer than I would like to the aircraft in front of me and stay 100ft higher and slightly to the right to keep the aircraft insight. Aircraft in front announces intentions to full stop land; and I announce that I will extend downwind for spacing. Aircraft in front calls base; I continue on downwind. Aircraft in front calls final; I call and turn base. I call and turn final upon seeing the Aircraft on short final and deem spacing to be appropriate for the Aircraft to vacate the Runway. Reviewing the radio calls; my call to Final was stepped on. Aircraft Z calls base; I'm expecting him to be behind me on base. Aircraft in front calls that they are on the runway and will be vacating; I verify that spacing looks good. My passenger (2nd GA flight) calls for traffic to the left; I look and see the Aircraft Y in downwind. 5-10 seconds later the broadside of Aircraft Z passes in front of the windshield at 100ft or less; same altitude. I call 'go around sidestep left' as I can see the shadow of Aircraft Z on the right of me. I announce intentions to depart crosswind to the south. Not hearing any calls from Aircraft Z I become concerned. Using my MFD; I identify the call sign of the aircraft involved and ask if they are OK? They respond they are OK and that they are in Downwind. I believe that Aircraft Z confused my radio calls for that of the Aircraft in front of me. I believe that the near miss with Aircraft Y after his 360 for spacing caused him to lose situational awareness. I believe that my call for final being blocked did not help Aircraft Z's SA. I believe that the lack of availability of pattern work at ZZZ/ZZZ1/ZZZ2 is making non towered fields like LMO busier than they should be.




Synopsis: Pilot reported communications and procedural errors caused two near midair collisions while conducting training at LMO uncontrolled airport.