A Boeing Co (NYSE:BA) 787 Dreamliner plane operated by Japan Airlines Co Ltd returned to Boston's Logan International Airport on Thursday after a mechanical indicator alert came on, driving Boeing shares 1.7 percent lower.
"The pilot decided to turn back out of an abundance of caution," airport spokesman Richard Walsh told Reuters.
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Carol Anderson, a spokeswoman for Japan Airlines, confirmed the move but offered no further details.
"As a standard precautionary measure due to a maintenance message indicator, JL007 bound for Tokyo-Narita is returning to Boston Logan for checks," she said.
The after-hours share fall reflected lingering concerns about Boeing's newest plane, which remains under investigation after a fire on board a parked 787 at Heathrow Airport in London last week.
(Reporting by Scott Malone and Peter Henderson; editing by Gary Hill and Matthew Lewis)