The aircraft were working on the Ponderosa Fire.
The Supertanker dropped on a wildfire 13 miles northeast of Oroville, California.
(Updated at 12:45 p.m. PDT August 31, 2017)
For the first time in several years the 747 SuperTanker dropped retardant on a wildfire in the United States. In 2016 and earlier this year the 19,000-gallon aircraft was used on fires in Israel and Chile, but it wasn’t until a few days ago that it had all of the inspections, tests, approvals, and very importantly, a contract in place.
On one sortie to the Ponderosa Fire northeast of Oroville, California at 7 p.m. MDT Wednesday August 30 Tanker 944 made two drops, half a load on each pass.
As this article was updated at 12:45 p.m. PDT August 31 the Tanker 944 was on another sortie in the same general area. (see above)
This aircraft is the second version of the Supertanker that was developed by Evergreen Aviation, originally in a 747-100. After buying the retardant system and the intellectual property, Global SuperTanker installed it in a newer more powerful 747-400.