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During the daily inspection prior to a series of glider towing operations, the pilot noticed that the brake linings were worn. During the landing roll following the third of these operations, the right brake failed and the aircraft ground looped before coming to rest. The brake had failed following the loss of hydraulic fluid from the seal for the brake caliper piston. This was caused by excessive piston travel, associated with severely worn brake linings. When the assembly was dismantled, it was found that the linings had worn completely off the backing plate, and those on the pressure plate were only 1.1 millimetres in depth. Both brake discs were pitted from the effects of corrosion, which would have caused the excessive wear in the linings.

Download Final Report
[ Download PDF: 22KB]
General details
Date: 02 March 1986 Investigation status: Completed 
Time: 1130  
Location:Warkworth Investigation type: Occurrence Investigation 
State: New South Wales Occurrence type: Loss of control 
Release date: 26 March 1986 Occurrence class: Operational 
Report status: Final Occurrence category: Accident 
 Highest injury level: None 
Aircraft details
Aircraft manufacturer: Cessna Aircraft Company 
Aircraft model: 185 
Aircraft registration: VH-RKZ 
Type of operation: Private 
Damage to aircraft: Substantial 
Departure point:Warkworth NSW
Departure time:1125
Destination:Warkworth NSW
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