Tokyo: Japan's All Nippon Airways (ANA) said Friday it has found damage to the battery wiring on two 787 emergency beacons, the same device suspected of causing a fire on an Ethiopian Airlines aircraft in London this month.
"We have found small damage to the covering of the battery wiring in two Emergency Locator Transmitters," said ANA spokesman Shinsuke Satake.
The company, which operates the world's largest fleet of Dreamliners, will send the two beacons back to the manufacturer, Honeywell International.
One of the devices, which emit distress signals to help rescuers locate downed craft, had not yet been installed on a plane.
An Ethiopian Airlines 787 Dreamliner caught fire at London's Heathrow airport earlier this month forcing the airport to shut down for an hour-and-a-half.
British authorities recommended that the distress beacons onboard all Boeing Dreamliners be disabled, after identifying the devices as the likely cause of the fire.
Boeing's troubled jet was grounded for more than three months earlier this year after two safety incidents involving the plane's lightweight lithium-ion batteries.