The Aleutian Goose, a heavily modified Goose, with TPE331 turbo engines and a 40 inch fuselage stretch to allow two extra observer seats in the cockpit. Crashed in 2011 in Al Ain, United Arab Emirates.

Converted by the US Fish & Wildlife Service to turbine power in 1971. Received a 40 inch fuselage extension in late 1974. Similar to but not identical to the McKinnon Turbo Goose. Reregistered N92MT in 1993.

Former US Navy JRF-5 37819. To US Department of the Interior with Fish and Wildlife Service as N780 in 1958. Had non-standard turbo conversion with 40 inch fuselage extension. To N92MT in 1993, CC-CTG in 1994, N92MT again in 1995, N86MT in 1996 and N221AG in 2001. Officially quoted as McKinnon G-21G c/n 1240, but this is not correct (McKinnon was not involved in the conversions). Destroyed in fatal crash at Al Ain Airport, United Arab Emirates in 2011.

Former US Navy JRF-5 37819. To US Department of the Interior with Fish and Wildlife Service as N780 in 1958. Had non-standard turbo conversion with 40 inch fuselage extension. To N92MT in 1993, CC-CTG in 1994, N92MT again in 1995, N86MT in 1996 and N221AG in 2001. Officially quoted as McKinnon G-21G c/n 1240, but this is not correct (McKinnon was not involved in the conversions). Destroyed in fatal crash at Al Ain Airport, United Arab Emirates in 2011.

Originally a US Navy JRF-5 (37819), this Goose was sold to the US Fish & Wildlife Service in 1952. Ferried to Alaska, the airplane spent the next 16 years in open storage at Anchorage before getting this unique Garrett turbine conversion in 1971. A 40-inch fuselage extension was added in 1974. Was in Chile for less than a year starting September 1994, "Gran Ganso" (Big Goose) returned the USA the following year and was registered N86MT.

What a machine! Although the aircraft is on the FAA register as a "McKinnon G-21G" c/n 1240, the conversion was done by US Fisheries & Wildlife Service. It is not a G-21G, but merely a G-21A fitted with TPE331 turbine engines (in 1971), a 40 inch fuselage extension (in 1974) and some G-21G modifications. There was no known involvement of McKinnon.