tdracer The 747 Global Super Tanker being used in the fight against the California fires is a -400 that uses the tankage systems from the certified ex Evergreen -100. The Evergreen -100 aircraft was apparently deliberately destroyed when they went out of business.
The 747-400 has been very busy of late, along with 2 x DC-10, a host of RJ/146, 2 x MD87 and some old Neptune turboprops.