20010811020569A

(-23) Approximately 06:30 the pilot arrived at the field in which he intended to do agricultural spraying. The pilot did two complete turns around this field to inspect for all powerlines prior to application. The pilot began the application of spray at a slow airspeed. The pilot did not see a small gage wire which ran from the house to a pumping facility. The helicopter struck this wire and contacted the ground inflicting substantial damage. The pilot had no injuries and weather was not a factor at the time of this accident. Upon notification from the regional duty officer on 08/11/2001, the reporting inspector was told this helicopter had been cleared from the accident site by the NTSB. (.19) on August 11, 2001, about 0603 hours pacific daylight time, a Bell 47G-4A, N4262Y, owned and operated by moore aviation, inc., tulare, California, impacted power lines and crashed into a field near Strathmore, California. Visual meteorological conditions existed during the aerial application flight that was performed under 14 CFR part 137. The helicopter was destroyed, and the commercial pilot received minor injuries. The flight originated from Strathmore about 0555. The operator reported that prior to the mishap the pilot had observed poles in the area, but had not observed the associated power lines. During a low altitude pass, the helicopter collided with the lines and crashed into an open field. No mechanical malfunctions or failures associated with the operation of the helicopter were reported.