Narrative:

My student and I were doing a lesson and it called for pattern work. We did a soft field take off and started to execute the climb out. The aircraft climbed out but was a little sluggish. At this point I took controls of the aircraft and got us back onto the runway heading; and obtained a vy attitude; because it had seemed like the pitch and attitude of the aircraft my student had it in was causing the aircraft to not climb at a true vy rate. Trying to pitch for vy with this slow climb caused the plane to drift slightly left of runway heading; which we got back onto. We were then told to state intentions and let them know we were correcting to continue onto the upwind. We then landed and did a touch and go and started the climb out; this time our climb performance being even worse; around 1200 MSL we were barely holding a climb rate of 200fpm. At this point I felt like the issue we were having was not related to my students takeoff and pitch; and more so an issue with the engine. I took controls again at this point and immediately checked out the engine instruments. The map; percent power; as well as RPM was all good and all other instruments checked out. We worked together and referenced the standby instruments as well. Once I checked all of that and the aircraft was still struggling to climb at a vy rate; I let tower know we were having an issue and could not maintain a safe climb rate; and [requested priority handling]. We let him know xxl was fine and safely made it onto the ground. Post flight showed no obvious signs of damage or anything external on the aircraft that would have caused the issue. Preflight was all normal with the proper amount of fuel as well as oil. At the time of run up and getting the current ATIS; the winds were nearly right down our runway xxl. Upon landing I noticed the winds had shifted more towards runway xy and believe that this possibly could have been a factor.

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Original NASA ASRS Text

Title: Flight Instructor and student reported terminating flight due to decreased performance during pattern work.

Narrative: My student and I were doing a lesson and it called for pattern work. We did a soft field take off and started to execute the climb out. The aircraft climbed out but was a little sluggish. At this point I took controls of the aircraft and got us back onto the runway heading; and obtained a Vy attitude; because it had seemed like the pitch and attitude of the aircraft my student had it in was causing the aircraft to not climb at a true Vy rate. Trying to pitch for Vy with this slow climb caused the plane to drift slightly left of runway heading; which we got back onto. We were then told to state intentions and let them know we were correcting to continue onto the upwind. We then landed and did a touch and go and started the climb out; this time our climb performance being even worse; around 1200 MSL we were barely holding a climb rate of 200fpm. At this point I felt like the issue we were having was not related to my students takeoff and pitch; and more so an issue with the engine. I took controls again at this point and immediately checked out the engine instruments. The MAP; percent power; as well as RPM was all good and all other instruments checked out. We worked together and referenced the standby instruments as well. Once I checked all of that and the aircraft was still struggling to climb at a Vy rate; I let Tower know we were having an issue and could not maintain a safe climb rate; and [requested priority handling]. We let him know XXL was fine and safely made it onto the ground. Post flight showed no obvious signs of damage or anything external on the aircraft that would have caused the issue. Preflight was all normal with the proper amount of fuel as well as oil. At the time of run up and getting the current ATIS; the winds were nearly right down our runway XXL. Upon landing I noticed the winds had shifted more towards runway XY and believe that this possibly could have been a factor.

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.