What happened
The agricultural aircraft experienced a complete loss of engine power while executing a turn shortly after departing from the airfield. The pilot attempted to execute a forced landing in the immediate vicinity. During this emergency descent, the aircraft struck a fence line and subsequently nosed over upon impact. The force of the collision was sufficient to tear the engine completely away from the airframe during the impact sequence.
The investigation
Following the accident, an FAA inspector conducted a post-crash examination of the recovered aircraft engine. The inspection focused on identifying mechanical failures or external factors that could have contributed to the power loss. The physical evidence gathered at the site was analyzed to determine the root cause of the in-flight failure.
Findings
The investigation revealed the presence of water within the carburetor. This contamination is consistent with carburetor icing, a condition where moisture in the air freezes inside the carburetor, restricting fuel flow and causing engine failure. The presence of water explains the sudden loss of power during the critical phase of flight.
Safety message
Pilots operating aircraft with float-type carburetors must be vigilant about carburetor heat usage, particularly during low-power settings such as takeoff and climb. Regular application of carburetor heat can prevent ice accumulation and maintain engine performance in humid or cold conditions.