Overview
A training flight experienced a gradual loss of power while operating in marginal weather conditions with light snow. The instructor initially believed the student had reduced throttle, instructing him to increase power. However, when the power loss persisted, the instructor assumed control but could not restore engine output. The ensuing emergency landing in an open field resulted in substantial damage to the aircraft.
Sequence of Events
During a local flight conducted under visual flight rules, the aircraft encountered marginal weather characterized by light snow. As the flight progressed, the engine began to lose power gradually. The instructor, noting the power decrease, assumed the student had inadvertently throttled back and directed him to apply more power. The student complied, but the power reduction continued. Recognizing a more serious issue, the instructor took over control and attempted to restore engine power, but his efforts were unsuccessful.
With engine power insufficient to sustain flight, the instructor executed an emergency landing in an open field. Upon touchdown, the aircraft sustained substantial damage from the rough terrain and impact forces.
Post-Accident Examination
Following the accident, a thorough inspection of the aircraft and its systems was conducted. The examination revealed no evidence of any preimpact mechanical malfunction or failure. All components appeared to have been functioning normally before the loss of power.
Weather Conditions
The flight operated in marginal weather conditions with light snow present at the time of the incident. Visibility and other weather factors are not specified in the available information.
Conclusion
Although the aircraft experienced a gradual power loss leading to an emergency landing and substantial damage, the post-accident inspection found no preimpact malfunction or failure. The exact cause of the power loss remains undetermined from the inspection alone.