<< >> NASA ASRS Report 1745502, June 2020

Cessna-172 pilot reported an near midair collision event in VFR landing pattern with trailing aircraft .

Attributes
ACN	1745502
Time
Date	202006
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	Other Entering VFR pattern
Route In Use	Visual Approach
Flight Plan	None
Aircraft 2
Make Model Name	Cessna 150
Operating Under FAR Part	Part 91
Flight Phase	Other VFR pattern
Route In Use	Visual Approach
Flight Plan	None
Person 1
Function	Instructor
Qualification	Flight Crew Flight Instructor Flight Crew Instrument
Experience	Flight Crew Last 90 Days 90 Flight Crew Total 525 Flight Crew Type 470
Events
Anomaly	Conflict NMAC
Miss Distance	Horizontal 500 Vertical 0

Narrative:

Entering left downwind for runway xx at ZZZ noticed aircraft Y also on downwind for runway xx. Prior to this; we announced our position and intention to enter runway xx downwind on CTAF. Aircraft Y made a takeoff call on CTAF and took off from runway xx as we were approximately 4 miles from entering downwind for runway xx. Aircraft Y made no further radio calls until after we announced our position on the downwind leg. After our downwind call; aircraft Y also announced that he was on downwind for runway xx. This is when I saw that he was co-altitude and approximately 500 feet to the left of my aircraft. At this point I maneuvered to maintain safe spacing between our aircraft.

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Original NASA ASRS Text

Title: Cessna-172 pilot reported an NMAC event in VFR landing pattern with trailing aircraft .

Narrative: Entering left downwind for RWY XX at ZZZ noticed Aircraft Y also on downwind for RWY XX. Prior to this; we announced our position and intention to enter RWY XX downwind on CTAF. Aircraft Y made a takeoff call on CTAF and took off from RWY XX as we were approximately 4 miles from entering downwind for RWY XX. Aircraft Y made no further radio calls until after we announced our position on the downwind leg. After our downwind call; Aircraft Y also announced that he was on downwind for RWY XX. This is when I saw that he was co-altitude and approximately 500 feet to the left of my aircraft. At this point I maneuvered to maintain safe spacing between our aircraft.

Data retrieved from NASA's ASRS site 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.