C172 pilot reported an near midair collision with another light aircraft while departing uao airport...

Narrative:

I was cleared for takeoff by the tower controller on runway 17 at uao. When starting my takeoff roll I requested a 'right turnout and then departure to the northwest;' which was approved. At 500 feet AGL I turned right to a northwest heading of approximately 320. When I reached 1;000 feet AGL I saw an aircraft on a northerly heading that was descending and going to cross paths with me. The aircraft was approaching me from the left (from the south) and I believe they were on a right downwind for runway 17 at uao. I felt that this distance was way too close for comfort and so I immediately stopped my climb and turned left to close the distance between me and the other aircraft before it descended to my altitude. I passed under the aircraft at approximately 100 feet below their altitude. I felt that if I had turned right instead passing under them; the pilot could have descended onto the top of my airplane. I initially thought I had possibly done something wrong and waited for ATC to scold me (or the other plane) for the loss of separation. Nothing ever came over ATC and I continued out of the airspace. As I thought more about the incident; I realize that I was flying exactly as I was cleared to by ATC. I'm not sure if the other pilot was incorrect; or lack of situational awareness by ATC. I'm still unsure. In the future I would make sure to advise ATC of the situation immediately instead of staying quiet.

Original NASA ASRS Text

Title: C172 pilot reported an NMAC with another light aircraft while departing UAO airport.

Narrative: I was cleared for takeoff by the Tower Controller on Runway 17 at UAO. When starting my takeoff roll I requested a 'right turnout and then departure to the NW;' which was approved. At 500 feet AGL I turned right to a NW heading of approximately 320. When I reached 1;000 feet AGL I saw an aircraft on a northerly heading that was descending and going to cross paths with me. The aircraft was approaching me from the left (from the south) and I believe they were on a right downwind for Runway 17 at UAO. I felt that this distance was way too close for comfort and so I immediately stopped my climb and turned left to close the distance between me and the other aircraft before it descended to my altitude. I passed under the aircraft at approximately 100 feet below their altitude. I felt that if I had turned right instead passing under them; the pilot could have descended onto the top of my airplane. I initially thought I had possibly done something wrong and waited for ATC to scold me (or the other plane) for the loss of separation. Nothing ever came over ATC and I continued out of the airspace. As I thought more about the incident; I realize that I was flying exactly as I was cleared to by ATC. I'm not sure if the other pilot was incorrect; or lack of situational awareness by ATC. I'm still unsure. In the future I would make sure to advise ATC of the situation immediately instead of staying quiet.

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.

Attributes
ACN	1620309
Time
Date	201902
Local Time Of Day	1201-1800
Place
Locale Reference	UAO.Airport
State Reference	OR
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	Initial Climb
Route In Use	None
Flight Plan	None
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	Initial Approach
Person 1
Function	Pilot Flying Single Pilot
Qualification	Flight Crew Private
Experience	Flight Crew Last 90 Days 7 Flight Crew Total 128 Flight Crew Type 90
Events
Anomaly	ATC Issue All Types Conflict NMAC
Miss Distance	Horizontal 300 Vertical 100