Event Details
During a flight, the engine experienced a partial loss of power. The pilot applied carburetor heat and adjusted the mixture, but the engine did not respond. As power continued to diminish, the pilot executed a forced landing on rough terrain. During the landing, the right wing struck the ground, resulting in substantial damage to the right wing spar.
Pilot Report
The pilot reported that no mechanical malfunctions or failures with the airplane would have precluded normal operation. He also stated that the accident could have been prevented if he had "checked for carb ice sooner."
Weather Conditions
The pilot reported that the temperature at the time of the accident was 30°F, and the dew point was 34°F. According to the FAA Carburetor Ice Probability Chart, a serious icing probability existed at cruise or climb power under those conditions.
Damage and Inspection
The airplane sustained substantial damage to the right wing spar. No other damage was reported.