GRUMMAN ACFT ENG COR-SCHWEIZER G-164B accident at Colusa, CA, 4 Jun 2023

On June 4, 2023, a GRUMMAN ACFT ENG COR-SCHWEIZER G-164B operated by Valley Air was involved in an aviation accident near Colusa, CA. No fatalities were reported. Investigators recorded the probable cause as: The pilot’s failure to maintain clearance from a power line during a low-level aerial application flight. Contributing to the accident was the pilot’s fatigue. This summary draws on records from NTSB; 12 related events involving the same aircraft type or operator are linked below.