7/22 930 SFO-LHR ^ Asked the captain directly during boarding, he turned it on
7/30 900 LHR-SFO
Asked the FA, FA said the captain said no
8/13 930 SFO-LHR
Asked the FA, never heard back
8/30 949 LHR-SFO ^ Asked one FA, never heard back. Asked another FA to call, a few minutes later it was on.