Was on DDMS.
From DDMS:
“However they have now announced that they will upgauge the route from a 789 back to a 77W on 4/28/19, 2 weeks before El Al plans to launch their San Francisco service. It’s also in time for summer 2019 service, though there is no other United route to Israel with seasonal aircraft adjustments.”
Now United changed to start it a month earlier.