UA 862 which was supposed to leave HKG on 10 August and then was rescheduled to 11 August due to a mechanical on the 10th, diverted to Tokyo and arrived into Tokyo at 1829 which leads me to believe they were past Tokyo and turned around.

Now the flight is suppose to leave NRT on 12 August at 1430 and arrive into SFO at 0735. Flight number is now UA 1758.

Trend here anyone