Apparently Cathay is changing the equipment for 885 to NO F

I had an award booking sfo-lax-bkk in May. A few days ago I received an email of change of time - no problem - sfo-lax changed by 30 minutes. A few days later I received a new ticket, but my lax-hkg had changed from F to C!!!
When I called Alaska they said CX said change of aircraft so no F - apparently CX is changing the aircraft between now and May (don't know when)! Had I not been connecting with the time change on AS I would not know until????
NO NOTIFICATION BY CX OR AS THAT THE CHANGE HAD BEEN MADE
So I now have time to make other plans - but if you have award booking on this flight might be a good idea to check when the equipment change occurs and take action now.