Loss of Control During Initial Climb Due to Engine Throttle Failure (N3742C)

What happened

During the initial climb phase of flight, the pilot reported that the aircraft had lost power from one engine. This event was immediately followed by a loss of control and a subsequent descent into a residential area.

The investigation

A subsequent physical examination of the aircraft revealed the mechanical cause of the failure. Investigators found a loose connection between the serrated washer on the left engine throttle and the corresponding serrated shaft. Records indicated that the engine in question had been removed and reinstalled only a few flight hours prior to the occurrence.

Findings

The primary contributing factor was the improper installation of the engine components, specifically the insecure attachment of the throttle mechanism. This mechanical failure resulted in an unintended power loss during a critical phase of flight.