19990526005699A

Pilot became disoriented in ground fog during an aerial application operation, and the acft crashed and was destroyed, the pilot/sole occupant suffered fatal injuries, other circumstances are unknown. (-23)on may 26, 1999 at approximately 0555 CDT, N8285K, a Grumman G-164-B agricultural airplane, was destroyed when it collided with terrain near Brinkley, Arkansas. The non-instrument rated commerical pilot, the sole occupant of the aircraft, received fatal injuries. The aircraft was registered to and operated by chism flying serivce inc., of Brinkley, Arkansas. According to the operator, the aircraft was loaded with 300 gallons of water mixed with 23 gallons of supper wham, a herbicide, before departing runway 20 at frank federer memorial airport, Brinkley, Arkansas, at approximately 0552. About two minutes after departure the pilot radioed to the operator that the airplane had entered a fog bank and he "was disoriented". There was no further communication bewteen the operator and the pilot. The operator reported that the visibility at the aiport was one mile the airplane departed. A witness, located on the airport, repoted that "shortly after" the acci dent airplane departed, the visibility decreased to 1/4 mile. No flight plan was filed.