What happened
During a maintenance test flight, the helicopter was hovering approximately 3 feet above ground level when the pilot lost control of the aircraft. The helicopter descended rapidly and impacted the surface with significant force. Upon touchdown, the aircraft rolled over onto its side or roof.
Following the accident, the pilot, who is not certified in the United States and does not speak English, immediately left the scene. Reports indicate that the individual headed toward maintenance facilities, but no further details regarding their status or recovery are available from the source record.
The investigation
NTSB investigators examined the wreckage of the aircraft to determine if mechanical failure contributed to the loss of control. The examination focused on critical flight control systems and powertrain components.
The inspection failed to detect any mechanical malfunction with the helicopter. All examined systems appeared consistent with normal operation prior to the impact, suggesting the accident was not caused by a pre-existing mechanical defect.
Findings
The primary factor in this accident was the pilot's loss of control during a low-altitude hover. The non-U.S. certified status of the pilot and language barriers complicate the assessment of crew resource management or procedural adherence, but the physical evidence points to human error as the sole cause.
Safety message
This incident highlights the risks associated with maintenance test flights, particularly when conducted by pilots who may not be familiar with local regulatory expectations or communication protocols. Strict adherence to hover stability procedures is critical during low-altitude operations.