NTSB

Probable Cause: Maintenance personnel’s failure to detect the corroded aileron cable during recent inspections, which resulted in the separation of the aileron control cable and a subsequent loss of airplane control during takeoff.

Probable Cause: The pilot’s failure to apply carburetor heat before initiating a descent in conditions conducive to the development of carburetor icing, which resulted in a partial loss of engine power due to carburetor ice.

Probable Cause: The pilot’s failure to apply carburetor heat during the landing approach, which resulted in a loss of engine power from carburetor ice.

Probable Cause: The pilot’s failure to maintain directional control during landing in a gusting crosswind.

Probable Cause: Failure of the down limit and down indicator switch and the warning horn switch assemblies, which prevented the landing gear from extending and at the same time providing a false indication that the landing gear was extended.

Probable Cause: The engine electronic ignition system became disconnected, which resulted in a partial loss of engine power.

Probable Cause: The airplane owner/builder’s inappropriate use of a lower grade fuel than that required by the airplane and engine operations manual, which resulted in engine detonation and the degradation and eventual obliteration of the Nos. 1 and 2 cylinder spark plug electrode tips.

Probable Cause: The pilot’s failure to engage the turbocharger for takeoff and his improper decision to continue the takeoff with partial power, rather than reject the takeoff.