British Airways Flight 9 , sometimes referred to as the Jakarta incident , was a scheduled British Airways flight from London Heathrow to Auckland, with stops in Mumbai, Chennai, Kuala Lumpur, Perth, and Melbourne.
On 24 June 1982, the route was flown by City of Edinburgh , a 747-236B registered G-BDXH. The aircraft flew into a cloud of volcanic ash thrown up by the eruption of Mount Galunggung, resulting in the failure of all four engines, although the reason for the failure was not then apparent to the crew or ground control. The aircraft was diverted to Jakarta in the hope that enough engines could be restarted to allow it to land there. The aircraft was able to glide far enough to exit the ash cloud, and all engines were restarted (although one failed again soon after), allowing the aircraft to land safely.