A Japan Airlines flight to Tokyo returned to the US amid a suspected fuel pump issue on the Boeing 787 Dreamliner.
It is the latest setback for Boeing's new aircraft after a lithium ion battery problem grounded the fleet in January and a blaze on an Ethiopian Airlines plane at Heathrow last week.
Japan Airlines spokeswoman Carol Anderson said Flight 007 returned to Boston's Logan Airport last night "as a standard precautionary measure" to check a maintenance message indicator showing the possible fuel pump problem.
A spokesman for the US Federal Aviation Administration said the incident was not an emergency.
The US Federal Aviation Administration has ordered safety checks on all Boeing's 787 Dreamliners currently in service to confirm that fuel line connectors have been properly installed, Boeing has said.
The inspection will affect its fleet of 33 jets.
It follows concerns that some connectors have not been properly installed.
The plane is due to start flying from Heathrow next week.
The FAA requirement, due to be issued today, "makes mandatory inspections already recommended by Boeing," the company said.