United Flight to Japan Turns Back Due to Engine Issue, Marking Airline's 10th Mechanical Problem in 2 Weeks
- United Airlines flight bound for Japan returns to SFO gate due to right engine issue
- Incident marks 10th mechanical problem for United in past 2 weeks
- Flight was taxiing for over an hour before returning to gate
- United spokesperson said they don't have details to share
- Website stated 430pm revised departure time; United apologized for disruption
