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The pilot had not previously landed at the particular area, but had carried out a detailed inspection to ensure no debris was present in the water, which was about one metre in depth. Almost immediately after touchdown the nose yawed some 20 degrees to the left and the aircraft pitched forward and overturned. A subsequent inspection revealed considerable damage to the hull below the cabin floor. The investigation discovered that the right hand nosegear door had previously been damaged. The repairs carried out had not corrected weaknesses in the door resulting from this damage. The area selected for landing on this occasion was too short for normal operations, and discolouring of the water prevented the pilot from detecting any obstructions below the surface. The aircraft adopted a nose-low attitude shortly after touchdown, but whether this was pilot induced or the result of striking a sankbank was not established. The resulting pressure of water on the nose area distorted the already weakened gear door and forced the left door sideways into about the normal open position. During the subsequent yaw and overturn, the right wing and the nose of the aircraft struck the bottom of the river.

Download Final Report
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General details
Date: 11 December 1985 Investigation status: Completed 
Time: 1924 Investigation type: Occurrence Investigation 
Location:12 km North Strahan  
State: Tasmania  
Release date: 30 July 1986 Occurrence category: Accident 
Report status: Final Highest injury level: Minor 
 
Aircraft details
Aircraft manufacturer: Lake A/C Div. Of Consolidated Aeronautics Inc. 
Aircraft model: LA-4 
Aircraft registration: VH-XDH 
Type of operation: Business 
Damage to aircraft: Substantial 
Departure point:Strahan TAS
Departure time:1924
Destination:Strahan TAS
 
 
 
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