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The aircraft was landing downwind on an agricultural strip. During the landing roll the aircraft departed the left side of the strip following the failure of the right brake coming to rest inverted in a rice paddy. The investigation found the right brake master cylinder had buckled in the reservoir area. The buckling and resultant misalignment of the piston rod caused a bending failure of the rod and liberation of the piston with a subsequent loss of hydraulic pressure to the right brake. The reason for the failure of the master cylinder was not determined. There are no other recorded accidents involving master cylinder failures in this type of aircraft. The failure is therefore considered an isolated case.

Download Final Report
[ Download PDF: 22KB]
General details
Date: 05 January 1990 Investigation status: Completed 
Time: 650  
Location:"Bodoca" Agricultural Strip (12 km E Griffith) Investigation type: Occurrence Investigation 
State: New South Wales Occurrence type: Loss of control 
Release date: 01 May 1990 Occurrence class: Operational 
Report status: Final Occurrence category: Accident 
 Highest injury level: None 
Aircraft details
Aircraft manufacturer: Grumman American Aviation Corp 
Aircraft model: G-164 
Aircraft registration: VH-HCR 
Serial number: 5B 
Type of operation: Aerial Work 
Damage to aircraft: Substantial 
Departure point:"Bodoca" NSW
Departure time:N/K
Destination:Bodoca NSW
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