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Fri, Sep 15, 2023

NTSB Prelim: Grumman Acft Eng Corschweizer G-164A

Airplane Was Topped Off With Fuel And 1,700 Lbs. Of An Insecticide The Night Prior To Accident

Location: Davis, CA Accident Number: WPR23LA305
Date & Time: August 6, 2023, 09:27 Local Registration: N5450
Aircraft: Grumman Acft Eng Corschweizer G-164A Injuries: 1 Fatal
Flight Conducted Under: Part 137: Agricultural

On August 06, 2023, about 0927 Pacific daylight time, a Grumman G164A, N5450, sustained substantial damage when it was involved in an accident near Davis, California. The pilot sustained fatal injuries. The airplane was operated as Title 14 Code of Federal Regulations Part 137 aerial application flight.

According to the operator, the airplane was topped off with fuel and 1,700 lbs. of an insecticide the night prior to accident. The morning of the accident, the pilot departed from Medlock Field Airport, Woodland, and conducted an aerial application of insecticide on a nearby field before he returned. The hopper was refilled with another 1,700 lbs. of insecticide. The pilot departed with the intention of conducting a second aerial application of insecticide on the same field.

Members of the loading crew reported that they continued with their daily tasks, and did not witness the accident, as they were located outside the vicinity of the accident site. Review of photos and GPS data provided by local law enforcement revealed that ground scars, consistent with the initial impact with terrain, were about 93 ft east of the main wreckage. The wreckage came to rest inverted in the field that the pilot was applying insecticide. A post impact fire ensued which consumed the engine compartment, fuselage, and empennage. The left and right upper and lower wings sustained impact damage to the leading edges, with thermal damage signatures emanating from the wing roots. The engine was separated from the engine mount and came to rest about 4 ft from the main wreckage.

The wreckage has been transported to a secure facility for further examination. 

FMI: www.ntsb.gov 

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