Incident Overview
A student pilot and a flight instructor were conducting a training flight that included a simulated engine failure. The throttle was set to idle to replicate the emergency scenario. When the throttle was advanced to recover from the descent, the engine did not respond. Attempts to restore engine power were unsuccessful, leading to a forced landing during which the aircraft collided with trees.
Pilot Reports
There was a discrepancy in the pilots' statements regarding the use of carburetor heat. The flight instructor reported that carburetor heat was used, while the student pilot stated it was not used.
Wreckage Examination
Examination of the wreckage revealed that the tail section had separated from the aircraft. Both wingtips displayed crush damage. Fuel was recovered from the scene. A detailed examination of the engine found no defects that would have prevented normal operation.
Environmental Conditions
A review of induction icing probability curves indicated that the temperature and dew point reported at the time of the accident fell within the "serious icing, glide power" range.
Procedural Reference
The Owner's Manual for the Cessna 150 outlines the descent procedures as follows: 1. Mixture - rich, 2. Carburetor Heat - apply full heat before closing throttle.