What happened
The incident occurred while an aircraft was conducting a low pass over Lake Austin. During this maneuver, the aircraft struck power cables suspended approximately 300 feet above the water surface. Witnesses on the ground reported hearing two distinct, loud cracking sounds at the moment of impact.
Following the collision with the wires, the helicopter experienced immediate and severe loss of control. Observers noted that the aircraft pitched upward sharply and began to gyrate wildly. Despite the violent motion, the pilot attempted to maintain forward momentum. The helicopter continued in its original direction of flight but descended rapidly into the lake at an approximate 30-degree nose-down angle.
The investigation
Investigation efforts focused on reconstructing the sequence of events leading to the impact with the power lines. Analysis of witness accounts provided critical data regarding the altitude of the cables and the immediate aerodynamic response of the aircraft upon contact. The physical evidence confirmed that the initial point of failure was the collision with the overhead infrastructure rather than a mechanical malfunction prior to impact.
Findings
The primary factor contributing to the accident was the aircraft's proximity to power lines during low-altitude flight operations. The pilot failed to maintain adequate clearance from the suspended cables, resulting in a catastrophic structural failure and subsequent loss of control. The violent gyrating observed by witnesses indicates that the impact likely caused asymmetric drag or control surface damage, making recovery impossible before the aircraft entered the water.