Na, itt a következő:

During the eruption of Redoubt Volcano in Alaska on 15 December 1989, a new B747-400 on a flight from Amsterdam to Anchorage flew into the plume and lost power from all four engines. The crew were able to restart the engines and land the aircraft safely. The initial estimate of damage to the aircraft was $80 million, including the replacement of all four engines (Brantley, 1990). VOLCANIC ASH CLOUDS POSE A REAL THREAT TO AIRCRAFT SAFETY Leonard J. Salinas, United Airlines, Chicago, Illinois