• C-GGWB de Havilland Canada Inc., Downsview, ON. Rolled out date 21-Jun-1985. First flight date unknown.

• B-3508 China Aviation Supply Corporation, Beijing, China. Delivered 21-Jun-1985.

• B-3508 Delivered to CAAC, Civil Aviation Administration of China, Xinjang Region, China, 11-Aug-1985.

Ferried via Reykjavik –Jersey, Channel Islands  21-Jul-1985.

• B-3508 Re-named China Xinjiang Airlines, Urumqi, China, Jun-1991.

• B-3508 Transferred to China General Aviation Corp, Xi’an, China, Jun-1992.

• B-3508 Merged into China Eastern Airlines, Shanghai, China, 01-Jan-1998.

• N824X Sold to Flight Center Aircraft Sales, Seattle, WA., 16-Dec-1998.

• N824X Sold to Earthdata Holdings Inc., Frederick, MD (Twin Otter, LLC., Gaithersburg, MD), 28-Jul-1999.

• N824ED Re regd to Earthdata Holdings Inc., Frederick, MD (Twin Otter, LLC, Gaithersburg MD), 08-Dec-1999.

Leased to Earth Data Aviation, Hagerstown, MD., 1999.

Accident: Ft Worth Meacham Field 11-Jan-2001 The flight was cleared for an ILS approach and as the airplane was approaching the point of glideslope intercept, both engines lost power. The airplane was vectored toward a nearby airport; however, after exiting the clouds, the pilot realized that the flight could not make the airport. The pilot initiated a forced landing to a field, and during the landing roll, the airplane crossed a road, and the right wing struck a tree. Subsequently, the nose landing gear separated when it struck a dirt berm. The airplane came to a stop upright. Examination of the fuel system revealed the aft main tank was 1/3-1/2 full of fuel, and the forward main tank 90% full of fuel. Examination of the cockpit revealed that the fuel selector for the main tanks was found in the NORMAL position. With the selector in the NORMAL position, the aft main tank supplies fuel to the left engine, and the forward main tank supplies fuel to the right engine. Examination of the fuel system revealed no discrepancies. The fuel boost pumps were activated, and fuel flowed from the fuel supply lines. The left and right airframe fuel filters and the left and right engine fuel filters contained fuel. Examination of both engines revealed no anomalies that would have precluded the operation of the engines. The pilot reported that at the time of the dual engine failure, the fuel selector was selecting the aft tank, thereby feeding both engines from the aft fuel tank. He further reported that when both engines failed, he immediately switched the fuel selector to "NORMAL". The aircraft's flight manual directs the pilot to position the fuel selector to "NORMAL" prior to take-off and for landing. Three persons on board uninjured. Accident file FTW01LA049.

• N824ED Sold to Texas Air Seriesvices, Dickinson, TX., 22-Mar-2001.

• N824ED Sold to Ashe Aircraft Enterprises, Springbank, AB., 22-May-2001.

• C-GIUZ Re regd to Ashe Aircraft Enterprises, Springbank, AB., 24-May-2001.

• N46RF US Dept of Commerce, National Oceanic & Atmospheric Administration, MacDill AFB., Lakeland,  FL., 07-Nov-2003. Regd 10-Nov-2003.

Airworthiness cert: 06-Apr-2004. Experimental – Research and Development.

Flew 04-Feb-2013 Minneapolis-Flying Cloud, MN - 09-Feb-2013 Winnipeg, MB - Minot, ND.

Flew 21-Oct-2013 MacDill AFB, FL - Millington, TN - Omaha-Eppley, NE 22-Oct-2013 Omaha-Eppley, NE - Rapid City, SD - Great Falls, MT 23-Oct-2013 Great Falls, - Calgary, AB - Springbank, AB.

Flew 11-Feb-2014 Springbank, AB - Springbank, AB Test flight. From the Rocky Mountain Aircraft facility.

Flew 13-Feb-2014 Springbank, AB - Great Falls, MT - Cheyenne-Regional, WY.

Flew 27-Feb-2015 Regina, SK - Springbank, AB to Rocky Mountain Air for maintenance.

Flew 11-Mar-2015 Springbank, AB - Winnipeg, MB - Thunder Bay, ON.

Flew 16-18 Dec-2016 St Petersburg – Memphis-Lincoln-Gillette, Great Falls-Springbank for attention by Rocky Mountain Aircraft Enterprises.

Note: Test flown 03-Jan-2017.

Note Attended Oshkosh event, Jul-2017.

• N46RF Re regd to US Dept of Commerce, National Oceanic & Atmospheric Operations Centre, MacDill AFB., FL., 29-Aug-2017.

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