Investigators Take Action Following Heathrow Fire       And I'm
Melissa Block.  This afternoon, a Japan Airlines 787 flying from
Boston to Tokyo was diverted back to Boston after a maintenance
alert indicator went off. Initial reports suggest a problem with
a fuel pump. But the bigger 787 news comes from London. British
investigators are trying to figure out what caused a fire this
past Friday on board a Boeing 787. It was parked at London's
Heathrow Airport. Today, investigators urged airlines to
temporarily disable a device on all 787s called an emergency
locator transmitter. The move follows two serious battery
incidents earlier this year that prompted a worldwide grounding
of the 787 fleet for more than three months.  NPR's Wendy
Kaufman is following this story. And, Wendy, first off, the name
gives a pretty clear indication of what it is, but why don't you
walk us through what an emergency locator transmitter does?
WENDY KAUFMAN, BYLINE: It does exactly what you would think.
BLOCK: Yeah.  KAUFMAN: They