A Japan Airlines flight to Tokyo returned to Boston on on July 18 because of a possible fuel pump issue on the Boeing 787 aircraft. It's the latest trouble for the new Dreamliner aircraft after a lithium ion battery problem grounded the fleet in January and a fire erupted on an empty Ethiopian Airlines plane parked at Britain's Heathrow Airport last week.    

Flight 007 returned to Boston as a standard precautionary measure to check out a maintenance message indicator showing the possible fuel pump problem and landed safely, Japan Airlines spokeswoman Carol Anderson said.    

The pilot didn't declare an emergency, and the aircraft burned off fuel before landing, Federal Aviation Administration spokeswoman Arlene Sarlac said. The plane left for Tokyo just before 1 pm and returned just before 6:30 pm. One of two battery fires that grounded the 787s for three months broke out on a Japan Airlines plane in Boston in January after passengers had exited. The next day, another Japan Airlines 787 leaked fuel at Logan.    

The airline said an open valve caused a tank to overflow through a vent. The 787 is the newest and highest-profile plane from US-based Boeing Co., which has said it stands behind its safety and overall integrity.