MONTREAL – Air Canada partner Chorus Aviation (TSX:CHR.B) has ordered up to 23 Bombardier Q400 turboprops. The Halifax parent company of Jazz Aviation placed a firm order for 13 planes valued at US$424 million at list prices. Options for 10 more Q400s planes would increase the value to US$758 million. The order follows the ratification by Chorus pilots of a new long-term contract that was a key part of an extended service agreement with Air Canada.