Quite a while back, I made a trip to Abbotsford. In more recent visits I have created posts of their Q400 based airtankers out on some test flights. However, before they became tankers, these were all airliners that had been retired from passenger service. Conair buys up these older airframes when the price is right, and they come to Abbotsford to await their time in the conversion program.
A few of them were sitting on the ramp when I made my visit. Some were being worked on while others were just waiting for some attention. Various bits were missing – often the expensive bits like engines. It is possible that some of the airframes might only be acquired to provide a source of spare parts and they will never fly again. I have no idea whether that is the case for any of these. Hopefully they will have since made it back into the air and are now being used to fight wildfires somewhere.