Aero Vodochody L39 N6175C accident near Grand Junction, Colorado

Probable cause

The pilot's inadequate preflight planning and subsequent failure to remain clear of power line wires while maneuvering at low altitude.

NTSB analysis

According to the pilot, while flying over a river at an altitude of about 100 feet above water and ground level, at 250 knots, the airplane impacted unmarked power line wires that spanned the river. The power line wires are clearly identified on the Visual Flight Rules Sectional Aeronautical Chart. The pilot immediately established a climb and returned to the airport without further incident. The airplane sustained substantial damage to the nose, left wing, and vertical stabilizer.

The pilot reported that there were no pre-impact mechanical failures or malfunctions that would have precluded normal operation.

Text from the NTSB. Open the NTSB docket for GAA15CA096 for the full record.