Beech 35 N2839V accident near Deer Park, Washington

Probable cause

An empennage flutter event for reasons that could not be determined based on the available information.

NTSB analysis

The pilot reported that he was practicing touch-and-go takeoffs and landings when, shortly after departure while climbing through about 400 ft above ground level in a right turn, he heard a loud bang and felt a vibration. The vibration ceased, and the pilot continued to his intended destination with no other anomalies noted. Substantial damage to the aft right fuselage was discovered during postflight inspection.

Examination of the aft fuselage revealed that the fuselage skin exhibited diagonal buckling, several stringers were bent or deformed, and several bulkheads were damaged. Opposing diagonal buckles or skin fractures in an “X” pattern were noted at several locations on the fuselage skin, coincident with a stringer or bulkhead location. No obvious damage was noted to the left side of the fuselage. The damage to the airplane was consistent with an empennage flutter event; however, in the absence of additional information, the cause of the flutter event could not be determined.

Text from the NTSB. Open the NTSB docket for WPR19LA171 for the full record.