Ambassador: Japan Airlines
Join Date: Mar 2008
Location: LAX
Programs: JAL Mileage Bank, JMB Diamond, oneworld Emerald, Bonvoy Platinum
Posts: 16,397
We don’t even have summer 2020 schedule and you are asking about winter 2020 already? A lot can change till schedule is announced and you should just treat the schedule and aircraft as placeholders for now.
One possible reason is the route is underperforming and they have to downgrade it to SS6.