What happened
Shortly after takeoff, the pilot noticed that the rear section of the upper engine cowling had lifted upward. This visual anomaly caused immediate concern regarding the potential for the cowling to detach completely during flight operations.
In response to this observation, the pilot initiated maneuvers to return the aircraft to the departure airport for a landing. However, while attempting to configure the aircraft for the return flight, the airplane entered a stall condition. The aircraft subsequently impacted terrain located adjacent to the runway.
The investigation
A preflight examination of the aircraft revealed that the pilot had removed and replaced the engine cowling prior to the flight. This maintenance activity is noted as part of the factual record surrounding the event.