UPDATE: A 48-YEAR-OLD pilot has died in a helicopter crash in central-west NSW.
The man was thought to be spraying weeds in a remote area 25km south of Mudgee when the aircraft crashed at about 11am (AEDT) today.
The wreckage of the Robin44 helicopter was found in steep and rugged bushland at Grattai.
The pilot, a local man, was pronounced dead at the scene.
A crime scene was established and a police guard remained at the site tonight.
NSW Police Force air crash investigators and officials from the Australian Transport Safety Bureau are to continue their inquiries tomorrow.
Police will prepare a coroner's report.