Mt. Redoubt, AK - 1989
"The most recent eruptions were in 1989-1990, it was the fourth and most damaging eruption this century. The eruptions caused considerable disruption to air traffic. Debris flows in Drift River valley threatened an oil tanker terminal. Damage and loss of revenue from ash and debris flows totaled about $160 million, making the 1989-1990 eruption the second most costly in the United States history."
http://volcano.und.edu/vwdocs/volc_images/north_america/alaska/redoubt.htmlI was in Amsterdam with a flight scheduled to leave for Anchorage the next day. Flight ops told us what had happened and that our flight was canceled till further notice. Standby.
We enjoyed a nice 3 day vacation in Amsterdam until things had settled down in Anchorage and we could proceed on our route.
Another airplane wasn't so lucky:
"All four engines of a KLM Boeing 747 temporarily shut down yesterday when the jumbo jet flew through a cloud of ash from the erupting Redoubt Volcano in Alaska, Government officials reported.
The huge airliner descended from 25,000 feet to 12,000 feet in eight minutes before the crew was able to restart two of the engines, and all four were operating when the plane, traveling from Amsterdam to Tokyo, landed at 12:25 P.M. in Anchorage, where it had been scheduled to stop for refueling.
Mr. Steucke said yesterday that the KLM crew members had reported after landing in Anchorage that they had been unable to see the volcanic cloud and that it did not show up on radar.
The plane was flying at about 25,000 feet, 75 miles northwest of Anchorage, when the crew reported smoke in the cockpit, Mr. Steucke said.
After the landing at Anchorage, a scheduled refueling stop, officials of the safety board and the KLM crew inspected the jet. ''It looked like it had been sandblasted,'' one official reported.
The KLM plane was to be flown to the Boeing company's production plant in Seattle, Mr. Steucke said. The passengers continued their trip to Tokyo on another plane.
http://query.nytimes.com/gst/fullpage.html?res=950DE2D71F3AF935A25751C1A96F948260 Note: The 'smoke in the cockpit' was actually ash, coming in through the plane's HVAC/presurization system.