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Before commencing spraying, the pilot conferred with the farmer who pointed out three sets of power lines. He checked the location of each of these lines in relation to an adjacent highway and a tree line in the area to be sprayed. He also completed an aerial survey. The pilot successfully sprayed the first three quarters of the paddock and then commenced on what he considered to be the more difficult section. As the aircraft descended over the line of trees to spray height, the pilot heard and felt a thump. He flew the aircraft back to the strip, where he discovered damage to the leading edge of both wings. The aircraft had struck a fourth set of wires. This two strand set was connected to a cross tree on an 11,000 volt pole, and strung for about one kilometre through trees to a pole beyond the highway. The farmer had neglected to mention this pair of wires and the pilot did not see it on his aerial survey.

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General details
Date: 05 November 1989 Investigation status: Completed 
Time: 1400  
Location:Ariah Park Narranderra Investigation type: Occurrence Investigation 
State: New South Wales Occurrence type: Wirestrike 
Release date: 02 April 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-JCW 
Serial number: 81B 
Type of operation: Aerial Work 
Damage to aircraft: Substantial 
Departure point:Ariah Park NSW
Departure time:1345
Destination:Ariah Park NSW
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