Mechanically identical to the Dash 8 - 40CW with a production total of 84 units .
The Dash 8 - 40CW is the Dash 8 - 40CM was constructed only for Canadian railways .
Mechanically identical to the Dash 8 - 40CW , the Dash 8 - 40CM was constructed only for Canadian railways , with a production total of 84 units .