Aviation safety investigations & reports

Loss of Control; Mt Vernon Station, WA; 1 September 2006; VH-RIL, Cessna 172L

Investigation number:
Status: Completed
Investigation completed


Download Final Report
[Download  PDF: 769KB]

On 1 September 2006, at approximately 1100 Western Standard Time, the pilot of a Cessna C172L aircraft, registered VH-RIL, was conducting a private, visual flight rules (VFR) flight, and together with four passengers (two adults, one child and an infant), departed from 'Bronco', a cattle mustering area on Mt Vernon station, WA. The pilot was to fly to the homestead on the property, a flight of approximately 10 minutes duration.

At the same time, members of the pilot's family and station staff left Bronco in motor vehicles to drive the approximately 30 km journey back to the homestead. Upon their arrival, it was noted that the aircraft had failed to arrive at the homestead. After attempts to contact the pilot by radio failed, a search was conducted, during which the pilot and child passenger were found walking towards the homestead. The pilot, who was disorientated and injured, reported that the aircraft had crashed in bushland adjacent to the homestead airstrip. The child had minor injuries.

After obtaining general directions to the aircraft, the search party were able to locate the aircraft wreckage. On arrival, searchers found a female adult passenger semiconscious with extensive injuries. The male adult passenger and the infant had been fatally injured.

The pilot and female passenger reported that the aircraft had entered severe turbulence during the descent to land, which resulted in a near-vertical nose down attitude of the aircraft approximately 300 to 350 feet above the terrain.

The investigation determined that the pilot had most likely flown through a strong willy-willy and was unable to recover from the in-flight upset. The investigation also found that it was likely that inadequate restraint of some occupants increased the severity of injuries sustained.

Download Final Report
[Download  PDF: 769KB]


Download Preliminary Report
[Download  PDF: 161KB]

Preliminary report released 2 November 2006

The pilot with four passengers on board, was conducting a private flight within the station property. The aircraft was later discovered destroyed after it had impacted the ground. Two of the passengers were fatally injured.

Download Preliminary Report
[Download  PDF: 161KB]
General details
Date: 01 September 2006   Investigation status: Completed  
Time: 1245 WST    
Location   (show map): Mt Vernon Station    
State: Western Australia   Occurrence type: Collision with terrain  
Release date: 11 December 2007   Occurrence category: Accident  
Report status: Final   Highest injury level: Fatal  

Aircraft details

Aircraft details
Aircraft manufacturer Cessna Aircraft Company  
Aircraft model 172  
Aircraft registration VH-RIL  
Serial number 17259230  
Type of operation Private  
Damage to aircraft Destroyed  
Departure point Mt Vernon, Station  
Destination Mt Vernon, Station  
  Crew Passenger Ground Total
Fatal: 0 2 0 2
Serious: 0 1 0 1
Minor: 1 1 0 2
Total: 1 4 0 5
Last update 18 April 2018