NTSB

A primary control (aileron) system anomaly that progressively worsened during a test flight that resulted in a loss of control. The reason for the anomaly was not determined due to impact damage.

The pilot’s excessive brake input while he attempted to maintain directional control during landing roll.

The student pilot/builder’s addition of winglets to the stabilator, which resulted in flutter and overstress failure of the stabilator control horn.

The loss of engine power due to fuel starvation.

The pilot’s decision to continue flight in instrument meteorological conditions in an airplane not equipped for instrument flight, which forced her to perform a precautionary landing to a muddy field resulting in the airplane nosing over.

The uncertificated pilot’s failure to maintain aircraft control during takeoff, which resulted in an impact with terrain.

The pilot’s decision to attempt to ” water ski” atop a remote river in a wheel-equipped airplane, resulting in a loss of control and a nose over.

The airplane’s encounter with a sunken area during takeoff from a turf runway, which resulted in the airplane becoming prematurely airborne and impacting a tree and then terrain.

The pilot’s inadequate preflight inspection and fuel planning, which resulted in the loss of engine power due to fuel exhaustion.