Aeronca 7CCM N2527B accident near Kenai, Alaska

Probable cause

A total loss of engine power due to carburetor icing as a result of the pilot’s inadequate use of carburetor heat.

NTSB analysis

The pilot reported that, during cruise flight about 1,500 ft mean sea level, the engine lost total power. The pilot initiated a forced landing to an abandoned access road. During the landing, the airplane collided with trees, which resulted in substantial damage to the left wing.

The weather conditions near the accident location about the time of the accident were conducive to carburetor ice at glide or cruise power. The pilot had been flying in the area and had completed her flight review earlier in the day with no carburetor icing issues. Although she had been using carburetor heat throughout the day, she could not remember if the carburetor heat was in the On or Off position when the engine lost power. The carburetor heat control was found in the Off position after the accident. The pilot does not remember if the carburetor heat was in the on or off position. Postaccident examination of the engine revealed no evidence of any mechanical malfunction or failure that would have precluded normal operation.

Based on the results of the engine examination and the postaccident position of the carburetor heat control, the loss of engine power was likely due to carburetor icing that had accrued due to an inadequate application of carburetor heat.

Text from the NTSB. Open the NTSB docket for ANC25LA026 for the full record.