On commencing the clean up run, the wire deflector on the aircraft struck a single power line. The top section of both the fin and rudder were severed from the aircraft which was subsequently landed at the DEPARTURE strip without further damage. The pilot had been briefed on the crop to be sprayed and on the location of power lines in and around the paddock. After cleaning up the other edges, the final run was commenced with the aircraft flying parallel to the main power lines. The pilot temporarily forgot the presence of the single wire running from the main line into the paddock.
