Ex N4700C, N2001, NC44783, 41-20133 (C-53). Originally converted with two Dart turboprops in 1969, registered as N4700C, and re-engined in 1977 (and re-registered as DC-3A-S1C3G N23SA) with three PT6A turboprops. Stored in 1980 and sold to Basler for rebuild as a Turbo-67, but not used and broken up by 2008. (A fuselage section was used in the rebuild of C-FMKB after it was severely damaged on 20 December 2007 in a take-off accident in Antarctica.)

Previously SE-DBA with SAS and HS-TGO with Thai Airways International. With Polair from Apr 79 to Dec 79 leased from Tropical Aircraft Leasing. Leased by Tropical to Aeronaves Del Peru Aug 1980. Crashed and written off in the jungle, 11 Sep 80, when it descended too low on approach to Iquitos, Peru.

C-53 in World War II (41-20133), demobbed in May 1945 and was with TWA before the end of the month (NC44783). John Conroy acquired the Three in January 1968 (N4700C) and it was flying as the Conroy Turbo-Three with two Rolls Royce Dart turboprops in 1969. Fitted with three PT-6A-45 and re-registered N23SA, it became the Tri-Turbo-Three in 1977. Here transiting through Winnipeg, a fire in the cockpit while the aircraft was being worked on at Santa Barbara, CA ended its flying days.