C-GBYU was one of two CL-215 based at Yellowknife during the 2007 fire season, at that time being operated by Buffalo Airways on behalf of the Northwest Territories Government. This aircraft was built in 1985 and has first been operated by Conair Aviation before joining Buffalo Airways . It appears that this airframe has been modified to CL-415 standard in early 2021 by Viking Air, the owner of the type certificate. The modification mainly consists of new and more powerful turbine engines, plus structural changes on the wing tips and elevator / horizontal stabilizer.

On an out of area deployment as part of a fire fighting group of three Firebosses. Catching the Ontario morning light at Red lake. Carrying the bombing number "40" and the polar bear logo and titles of The Government of The Northwest Territories, operated on its behalf by Buffalo Airways of Yellowknife, NWT. A recent replacement for their retired CL-215s. On detachment on "back-filling" duty, reinforcing the Fire Service in Ontario, which was experiencing a higher Forest fire threat at that point.

Owned and operated by Buffalo but wearing NWT government titles and logos only. Left Buffalo for Longview Aviation services late 2017, likely to be converted into a CL-415.

One of six Buffalo CL-215s that went to Viking Air (managed by Longview Aviation Asset Management) to be converted into CL-415EAFs. By 2019, this one's NWT titles and logo had been replaced with those of the new owner and a badge promoting the new type. At the photo date, it carried no visible Buffalo markings.

Fuelling, oiling and preparing for departure to the south along Okanagan Lake.

One of four CL-215 aircraft parked at Yellowknife. #291/C-GBPD parked in the background with #290/C-GBYU and #296/C-GDHN parked in the second row.

Eight new Air Tractor Fireboss aircraft replace Northwest Territories' Canadair CL-215 fire fighting fleet. Tanker 43 has been outfitted and checked out by Conair before delivery. The aircraft will be operated by Buffalo Airways under contract for the province.