Primary finding
Probable cause
the pilots failure to keep visual contact with and to avoid unmarked powerlines adjacent to the crop field he was spraying.
Investigator assessment
Analysis narrative
The agricultural application airplane was making an application turn when it struck unmarked but known wires. The pilot egressed the airplane without assistance and the airplane was destroyed by post-crash fire. No mechanical discrepancy was noted by the pilot, nor found during post crash inspection.
Source record
Factual narrative
On August 22, 1994, at 1933 central daylight time, a Grumman G- 164A, operated by Benoit Aerial Spraying of Kankakee, Illinois, as an agricultural aircraft, impacted powerlines 2 miles east of Clifton, Illinois, during aerial application and was destroyed. The commercially certificated pilot received minor injuries, egressed the airplane without assistance, the on board chemicals were spilled, and a post crash fire occurred. Visual meteorological conditions existed at the time of the accident and no flight plan was filed. The flight operated under 14 CFR Part 137 and had originated from a private strip near Kankakee, Illinois. The pilot stated that he contacted the known but unmarked powerlines during an application turn. He did not indicate, nor were any pre-impact mechanical discrepancies noted during the investigation. -