The Australian Transport Safety Bureau (ATSB) has released its final report into a tragic mid-air collision between two helicopters in Western Australia, pinpointing the likely cause of the accident that claimed the lives of two experienced pilots.
Details of the Fatal Collision
On the morning of January 2, 2023, two Robinson R44 helicopters collided near Mount Anderson Station, approximately 120 kilometres south of Newman in the Pilbara region. The helicopters, registered as VH-IDU and VH-XJV, were engaged in mustering operations for the station.
The pilots, identified as Peter Ritter, 59, and Gavin Uren, 40, were both highly qualified. Mr. Ritter held a commercial pilot licence with over 6,500 flying hours, while Mr. Uren had a commercial licence and more than 2,200 hours of experience.
The ATSB investigation determined that the two aircraft were flying in close proximity, following a group of cattle, when the collision occurred. VH-IDU, piloted by Mr. Ritter, descended onto VH-XJV, piloted by Mr. Uren. The impact caused catastrophic damage, and both helicopters crashed to the ground, resulting in the immediate deaths of both men.
Investigation Findings and Probable Cause
The investigation concluded that the accident was not due to mechanical failure. Both helicopters were well-maintained and had no known defects. Instead, the ATSB focused on human factors and operational conditions.
The key finding was that the pilot of the descending helicopter likely experienced a loss of visual reference with the other aircraft. This loss of situational awareness, known as ‘look-but-fail-to-see’, occurred despite the clear weather conditions. The pilots, while communicating via radio about the mustering activity, were primarily focused on the livestock below, which may have diverted their attention from maintaining safe separation.
The ATSB’s final report states: "The loss of visual reference by the pilot of VH-IDU with VH-XJV, while both helicopters were manoeuvring in close proximity during mustering operations, led to the collision."
Safety Message and Industry Impact
This tragic incident has sent a sobering reminder to the aviation industry, particularly within the agricultural mustering sector where flying in close quarters is common. The ATSB emphasised the critical importance of maintaining a vigilant visual scan and strict adherence to separation protocols, even during routine operations.
The report underscores that high workload and divided attention can significantly increase risk. It serves as a case study for pilot training, highlighting the need for continuous reinforcement of collision avoidance techniques and spatial awareness during low-level flying.
The deaths of Peter Ritter and Gavin Uren have been deeply felt within Western Australia's tight-knit aviation and pastoral communities. The ATSB’s findings aim to contribute to improved safety practices to prevent similar tragedies in the future.
