Both United Airlines and All Nippon Airways (ANA) have found wiring faults on their 787 emergency locator transmitters (ELT) after US authorities called for an inspection of the units. United found a pinched wired on one of its six 787s and ANA found the same issue on two of the 20 787s it operates. The FAA called for an inspection of all ELTs under a mandate released last Friday (26 July). It asked airlines to look for "proper wire routing and any signs of wire damage or pinching," as well as any moisture, possibly caused by condensation. Both United and ANA have removed the faulty ELTs and returned them to the manufacturer, Honeywell International. ANA has also removed all beacons from the eight 787 it flies domestically; it has found no faults on the ELTs on the 12 Dreamliners it flies internationally and these will stay in place. The checks come after a fire on 12 July on an Ethiopian Airways 787, parked at Heathrow Airport. The UK’s Air Accidents Investigation Branch (AAIB) traced the fire to the aircraft's ELT and noted that it had a pinched wire. Officials are also investigating the possibility of moisture, caused by condensation, getting to the transmitter.