The helicopter company advised AMSA of the crash soon after 1pm (AEDT) on Tuesday.
The helicopter crashed near Cooktown in the Mt Cook National Park.
Several of the six people on board the helicopter are reported to be injured.
AMSA has tasked a helicopter from Townsville, AMSA’s Cairns based search and rescue aircraft and a ground response team, comprising of local police, fire-fighting rescue service, ambulance and National Park personnel.