Aviation safety investigations & reports

Cessna 185A, VH-AGK, Moora, WA, 16 April 1970

Investigation number:
Status: Completed
Investigation completed


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On the 38th landing since commencing work that day the aircraft made a three point landing with the hopper open and empty and full flap lowered. As the aircraft touched down the port undercarriage main spring leg fractured eight inches from the inboard end at the bend radius. The port wing dropped and after travelling about 300 feet the pilot was unable to maintain control of the aircraft, which commenced turning and sliding to the left and turned through 180 degrees before coming to rest 525 feet after touch down. Examination of the broken undercarriage leg suggests that the quality of the shot peening of the component, a possible small material defect and the presence of light surface corrosion may all have been factors in the initiation of a fatigue crack which led to the eventual failure of the leg.
Download Final Report
[Download  PDF: 134KB]
General details
Date: 16 April 1970   Investigation status: Completed  
Time: 1420 WST    
Location: Moora    
State: Western Australia    
Release date: 03 February 1971   Occurrence category: Accident  
Report status: Final   Highest injury level: None  

Aircraft details

Aircraft details
Aircraft manufacturer Cessna Aircraft Company  
Aircraft model 185  
Aircraft registration VH-AGK  
Type of operation Aerial Work  
Damage to aircraft Substantial  
Departure point Agricultural Strip  
Departure time 1415  
Destination Agricultural Strip  
Last update 16 May 2014