Incident Overview
While cruising in instrument meteorological conditions at 7,000 feet, the pilot experienced an engine surge followed by a loss of power. The pilot's actions included switching fuel tanks and turning on the electric fuel pump. However, the fuel pressure gauge indicated no pressure, and the engine did not regain full power. The pilot did not apply carburetor heat during the power loss event.
Emergency Response
The pilot radioed air traffic control and declared an emergency. Subsequently, during the emergency landing, the airplane collided with trees.
Post-Accident Examination
A post-accident examination of the airplane revealed that the fuselage was buckled and both wing assemblies had separated from the fuselage. No mechanical or flight control anomalies were identified during the examination.
Relevant Guidance
An Advisory Circular (AC 20-113, item 7.A-8) notes: "If induction system ice is suspected of causing a power loss, apply full heat or alternate air. Do not disturb the throttle until improvement is noted. Expect a further power loss momentarily and then a rise in power as the ice is melted."