Seems like there is also a prevailing oil pressure issue as well...
Poor United....what is this...4 United 787's in a week?
Edit: just checked...United has 6 787's.
Second United Dreamliner diverted with oil-related problem
"United flight 125 from London's Heathrow airport to Houston diverted to Newark, New Jersey due to a low oil indication, United said in an emailed statement. The airline said the aircraft landed normally and without incident around 2:15 p.m. local time and customers were put on other flights."