What happened
The pilot reported that while rolling out after landing at approximately 20 mph in a three-point attitude, he experienced a sudden loss of directional control to the left. He attempted to correct the drift using right rudder, right brake, and by reducing power on the left engine. However, the correction was excessive, causing the aircraft to turn sharply to the right. This maneuver resulted in the failure of the left main landing gear.
The investigation
The collapse of the left main gear led to substantial structural damage. The impact damaged the keel, the wheel well area, the left wing tip, and the left wing float. No further mechanical examination details were provided in the source text.
Findings
The primary factor was the loss of directional control during the landing rollout, followed by an over-correction that exceeded the structural limits of the landing gear assembly.