It's the latest woe for the new Dreamliner aircraft after a lithium ion battery problem grounded the fleet in January and a fire on an Ethiopian Airlines plane last week.
Japan Airlines spokeswoman Carol Anderson says Flight 007 returned Thursday "as a standard precautionary measure" to check out a maintenance message indicator showing the possible fuel pump problem.
Federal Aviation Administration spokeswoman Arlene Sarlac says the pilot didn't declare an emergency and the aircraft burned off fuel before landing.
The plane left for Tokyo just before 1 p.m. Thursday for a flight of nearly 14 hours. It returned shortly after 6 p.m.