David Eyre 
N154AC Sikorsky S-64E Skycrane (MSN 64-037), named ‘Georgia Peach’, of Erickson Air-Crane over Jervoise Bay– 22 December 2016.. Built in 1967. Delivered to the US Army in February 1968 as 68-18435, a CH-54A Tarhe. Last served with 1160 Aviation Company, Georgia Army National Guard. Retired from military service in late 1980s. On 26 March 1992, registered to Erickson Air Crane Co, Central Point, Oregon, USA as N154AC. Photographed here using its sea snorkel/boom to pick up water during demonstration runs for the official launch of the 2916/17 fire season. Photo © Keith Anderson (Photographed using Canon cameras and lenses)
David Eyre and Brenden Scott have compiled a list and photos of the fire fighting aircraft in Western Australia for the summer fire season (Oct 2020 – April 2021).
A very good article with plenty of info. Thanks to all who supplied photos
Thank you John!
Why is this aircraft carrying a Papua New Guinea registration?
They use aircraft with Papua New Guinea and US registrations, perhaps as CASA is too restrictive.