It was infact a DHC4. I am led to believe it was the civil varient that was to be released if the testing succeeded.
Date: 27 AUG 1992
Time: 10:20
Type: de Havilland Canada DHC-4T Caribou
Operator: NewCal Aviation
Registration: N400NC
Msn / C/n: 240
Year built: 1965
Crew: 3 fatalities / 3 on board
Passengers: 0 fatalities / 0 on board
Total: 3 fatalities / 3 on board
Airplane damage: Written off
Location: Gimli, MB (Canada)
Phase: Initial climb (ICL)
Nature: Test
Departure airport: Gimli Airport, MB (YGM)
Destination airport: Gimli Airport, MB (YGM)
Narrative:
The aircraft took off for a test flight for a turbine-engine conversion programme. It climbed steeply, rolled to the right and crashed in a nose-down, rightwing-low attitude.