Aviation safety investigations & reports

Cessna C402-C, VH-TFD, Ngukurr NT, 21 December 1987

Investigation number:
Status: Completed
Investigation completed


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Following a normal touchdown and landing roll, the pilot commenced a left turn to backtrack along the runway to the parking area. During the turn the right main landing gear leg collapsed. An inspection of the gear leg revealed an incorrectly seated O-ring, which had allowed hydraulic pressure to bypass a section of the oleo. This resulted in the internal locking pins becoming unlatched prematurely when the assembly was subjected to side loads during the turn at the end of the runway. Records showed that the O-ring had recently been replaced, and it is likely that the distortion of the ring occurred during the oleo re-assembly process.

Download Final Report
[Download  PDF: 22KB]
General details
Date: 21 December 1987   Investigation status: Completed  
Time: 843    
Location: Ngukurr    
State: Northern Territory    
Release date: 29 April 1988   Occurrence category: Accident  
Report status: Final   Highest injury level: None  

Aircraft details

Aircraft details
Aircraft manufacturer Cessna Aircraft Company  
Aircraft model 402  
Aircraft registration VH-TFD  
Serial number 402C0420  
Type of operation Aerial Work  
Damage to aircraft Substantial  
Departure point Tindal NT  
Departure time 0743  
Destination Ngukurr NT