America West is not a Star Alliance carrier. And it has no separate agreement with Air Canada. Any flight on America West ("USAirways West") metal will not get credit in Aeroplan. It doesn't matter whether it's ticketed on USAirways ticket stock or with a USAirways code.
Eventually the two operations will be merged and they'll operate under the USAirways flight certificate, at that point all of their flights will earn Aeroplan credit.