• CF-SJB (2) de Havilland Canada Inc., Downsview, ON. Rolled out -1973. First flight -1973.

• CF-SJB (2) Kenn Borek Air, Calgary, AB. Delivered 18-Sep-1973.

Accident: Eastmain, PQ 29-Jan-1979 Damaged when pilot attempted a soft wheel take-off. Aircraft repaired.

• CF-SJB (2) Returned to service with Kenn Borek Air, Calgary, AB., Nov-1979.

• N4901D Borek Construction Ltd, Juneau, AK. Regd 06-Dec-1979.

• N4901D Leased to Evergreen Helicopters, Anchorage, AK., 06-Dec-1979.

• C-FSJB (2) Returned to Kenn Borek Air, Calgary, AB., 01-Apr-1981.

• N4901D Leased to Empire Airways, Hayden Lake, ID., 15-May-1981. Canx 15-Oct-1981.

• C-FSJB (2) Returned to Kenn Borek Air, Calgary, AB., 27-Oct-1981. Canx 15-Oct-1981.

• C-FSJB (2) Leased to unknown operator. Oct-1981.

• C-FSJB (2) Returned to Kenn Borek Air, Calgary, AB., 14-May-1982.

• C-FSJB (2) Leased to Empire Airways, Hayden Lake, ID., -Jun-1983.

• C-FSJB (2) Returned to Kenn Borek Air, Calgary, AB., Sep-1983.

• C-FSJB (2) Leased to Us Antarctic Survey, 25-Oct-1984.

• C-FSJB (2) Returned to Kenn Borek Air, Calgary, AB., Feb-1985.

• C-FSJB (2) Leased to Empire Airways, Hayden Lake, ID., May-1986.

• C-FSJB (2) Returned to Kenn Borek Air, Calgary, AB.,16-Sep-1986.

• C-FSJB (2) Leased to Adventure Network International,1988.

• C-FSJB (2) Returned to Kenn Borek Air, Calgary, AB., Feb-1989.

• C-FSJB (2) Leased to Adventure Network International, Oct-1990.

• C-FSJB (2) Returned to Kenn Borek Air, Calgary, AB., 1991.

• C-FSJB (2) Leased to US Antarctic Survey, 12-Oct-1994.

• C-FSJB (2) Returned to Kenn Borek Air, Calgary, AB., 1995.

• C-FSJB (2) Leased to Harbour Air, Vancouver, BC., 18-Mar-1995.

• C-FSJB (2) Returned to Kenn Borek Air, Calgary, AB., 1995.

• C-FSJB (2) Leased to US Antarctic Survey, 28-Sep-1995.

• C-FSJB (2) Returned to Kenn Borek Air, Calgary, AB., Feb-1996.

• C-FSJB (2) Leased to US Antarctic Survey, Oct-1996.

• C-FSJB (2) Returned to Kenn Borek Air, Calgary, AB., 22-Feb-1997.

• C-FSJB (2) Leased to Harbour Air, Vancouver, BC., 30-Aug-1997.

• C-FSJB (2) Returned to Kenn Borek Air, Calgary, AB.

• C-FSJB (2) Leased to US Antarctic Survey, 13-Oct-1997.

• C-FSJB (2) Returned to Kenn Borek Air, Calgary, AB.,, 21-Feb-1998.

• C-FSJB (2) Leased to US Antarctic Survey, 21-Oct-1999.

• C-FSJB (2) Returned to Kenn Borek Air, Calgary AB., 2000.

• C-FSJB (2) Leased to Harbour Air, Vancouver, BC., 2000.

• C-FSJB (2) Returned to Kenn Borek Air, Calgary, AB., 07-Sep-2000.

• C-FSJB (2) Leased to Harbour Air, Vancouver, BC., 2001.

• C-FSJB (2) Returned to Kenn Borek Air, Calgary, AB, Sep-2001.

Ferried to Antarctica Nov-2006 via Houston TX, Cayman Islands Guayaquil, Ecuador, Arica, Puerto Montt, Punta Arenas all Chile.

Accident: 168 km (105 mls) N of Alert, Ellesmere Island, NU 10-May-2010. A ski-equipped de Havilland Canada DHC-6 Twin Otter 300 aircraft sustained substantial damage in an accident on the ice 168 km N of Alert, Ellesmere Island, NU, Canada.

The aircraft had two crew and three scientists on board for a survey mission. The flight crew performed a ski drag and landed on the second approach. Once the aircraft was stopped, the right landing gear broke through the ice while both engines were running. The right engine hit the ice under power. Both engines were then shut down. The captain called on the HF radio for rescue while the first officer initiated evacuation of the passengers, the recovery of the survival gear and the activation of the Emergency Locator Transmitter (ELT). All the occupants moved away from the broken ice surface. A camp was set up and communication was made via Sat phone with Resolute Bay base. Two hours later a Bell 407 helicopter arrived to evacuate all the occupants to Alert. There were no injuries. The aircraft fuselage was last seen submerged up to the wings, tail high.

• C-FSJB(2) Kenn Borak Air Ltd. Canx 06-Apr-2011. Removed from register 30-May-2011 following accident.

• Status unknown •

A photographic essay of a trip from Calgary to Greenland in 2008 to test a new airborne geophysical system can be seen on hyperlink as follows:-

http://michaelstudinger.smugmug.com/Landscapes/Greenland-2008/17206366_4zxqPx/1305325808_Vk9jxxq#!i=1305325808&k=Vk9jxxq