Narrative:

I experienced [an] engine malfunction shortly after takeoff; after the 2nd turn [in the pattern I experienced] shaking of the aircraft [and] loss of power. [Advised ATC]. Cause of engine failure unknown. Fuel [was] 3/4 [full]. Landed safely without any damage or injuries.

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Original NASA ASRS Text

Title: C150 pilot reported executing a successful forced landing at the departure airport after loss of engine power on downwind.

Narrative: I experienced [an] engine malfunction shortly after takeoff; after the 2nd turn [in the pattern I experienced] shaking of the aircraft [and] loss of power. [Advised ATC]. Cause of engine failure unknown. Fuel [was] 3/4 [full]. Landed safely without any damage or injuries.

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.