The United Kingdom's Air Accidents Investigation Branch (AAIB)has issued a special bulletin pertaining to a fire onboard a parked Ethiopian Airlines (ET) Boeing 787-8 (MSN 34744 | ET-AOP) at London Heathrow Airport last week has been released. According to the report, suspicions thus far point to the aircraft's Emergency Locator Transmitter (ELT) and its associated system wiring. On the basis of these initial findings and a recommendation from the AAIB, the US Federal Aviation Administration has said it is preparing to issue an Airworthiness Directive in the coming days that would make inspections of all ELTs aboard Boeing 787 aircraft, mandatory.