A decision by US aviation officials to order airlines to remove or inspect emergency beacons in Boeing 787 Dreamliners, follows a recent fire on a parked plane at Heathrow Airport.
Last week, UK air accident investigators also called for a review of the devices, after an investigation found the fire on the Ethiopian Airlines jet was caused by a fire in the transmitter.
Boeing said at the time that it supported the recommendations made in the report by the Air Accidents Investigation Branch.
More top news
Glaucoma is the biggest cause of permanent blindness and affects 60 million people around the world - a tenth of whom are completely blind.
United Airlines has apologised for its initial response after a passenger was injured as he was forcibly removed from an overbooked flight.
It is said that the teenager attacked and raped the woman, in her forties, on April 19 near to a park in Kidbrooke, south-east London.