Western Airlines Flight 470
Encyclopedia
Western Air Lines Flight 470 was an air accident that happened on March 31, 1975. The Boeing 737-200 aircraft overran the runway at Casper/Natrona County International Airport after a flight from Stapleton International Airport
. None of the 96 passengers and 6 crew on flight 470 were killed but 4 were injured and the aircraft was damaged beyond repair.
at 07:03 on a short domestic flight to Casper/Natrona County International Airport. There were 93 passengers and 6 crew on board flight 470. The Boeing 737 climbed to its cruising altitude of FL220. At 07:36, following a descent to 12,000 feet, the flightcrew contacted Casper approach control and advised that the flight was about 12 miles south of the Evansville Intersection. At that time, the controller cleared the flight to use the localizer back course approach for runway 25, to circle to runway 3, or to land straight in. The weather reported to the crew indicated poor visibility with light snow falling and wind 040deg at 9 knots. One minute later, the approach controller advised that "runway 7/25 has been plowed. There's about a 1/4-inch of powder snow on it. Braking action reported, Convair 580, as poor. Runway 3/21 is being plowed at this time." At 07:51, Flight 470 reported at the Henning Intersection and was cleared to contact the Casper Tower. The tower controller cleared the flight to land on runway 25 and gave the wind as 030deg at 8 knots. The flight was also advised by the controller that a disabled snow blower
was "just west of the intersection runway 21, left side runway 25, on the edge ...." At 07:41:42, the first officer called out "thousand to go to the field." At 07:42:09, the first officer called "approaching minimums," and 12 seconds later, he called "just about at minimums." The aircraft then flew level for a few moments at the minimum descent altitude (MDA). At 07:42:25, the first officer called the runway in sight directly below the aircraft. At that time airspeed was 150 knots and the flaps were at 25deg. The first office then set the flaps at 30deg as the captain initiated the final descent. The aircraft crossed the threshold at reference speed +15 knots. The aircraft touched down 2375 feet from the departure end of the runway, about 6,306 feet from the approach end of the runway. The aircraft went off the departure end of the runway to the right of the centerline. After striking several metal stanchions in the first row of terminal bar lights, which were located 200 feet off the end of the runway, the aircraft struck a shallow irrigation ditch 280 feet off the runway end. The aircraft veered farther to the right and stopped about 800 feet beyond the departure end of the runway. There was no fire and the aircraft was damaged but only four passengers were injured. All 99 passengers and crew on board flight 470 got off the aircraft and survived.
sent John H. Reed and he found the failure of the pilot-in-command to exercise good judgment when he failed to execute a missed approach and continued a non-precision approach to a landing without adequately assessing the aircraft's position relative to the runway threshold. Contributing to the accident were the excessive height and speed at which he crossed the approach end of the runway and the failure of other flight crew members to provide him with required callouts." His report into the accident was realised on October 30 1975, 7 months after the accident.
Stapleton International Airport
Stapleton International Airport was Denver, Colorado's primary airport from 1929 to 1995. At different times it served as a hub for TWA, People Express, Frontier Airlines and Western Airlines as well as a hub for Continental Airlines and United Airlines at the time of its closure.In 1995 Stapleton...
. None of the 96 passengers and 6 crew on flight 470 were killed but 4 were injured and the aircraft was damaged beyond repair.
Aircraft
The aircraft involved was a Boeing 737-200 (Registration: N4527W) that was only 11 months and 5 years old at the time of the accident.Flightcrew and Flight attendants
The flightcrew onboard flight 470 was captain Jack Mylenek , first officer Anthony Cavalier and second officer Charles Glasscock. There were three flight attendants on-board: Jeanne Travis, Marilyn Axtell and Jane Rither.Accident
Western Air Lines Flight 470 departed Stapleton International AirportStapleton International Airport
Stapleton International Airport was Denver, Colorado's primary airport from 1929 to 1995. At different times it served as a hub for TWA, People Express, Frontier Airlines and Western Airlines as well as a hub for Continental Airlines and United Airlines at the time of its closure.In 1995 Stapleton...
at 07:03 on a short domestic flight to Casper/Natrona County International Airport. There were 93 passengers and 6 crew on board flight 470. The Boeing 737 climbed to its cruising altitude of FL220. At 07:36, following a descent to 12,000 feet, the flightcrew contacted Casper approach control and advised that the flight was about 12 miles south of the Evansville Intersection. At that time, the controller cleared the flight to use the localizer back course approach for runway 25, to circle to runway 3, or to land straight in. The weather reported to the crew indicated poor visibility with light snow falling and wind 040deg at 9 knots. One minute later, the approach controller advised that "runway 7/25 has been plowed. There's about a 1/4-inch of powder snow on it. Braking action reported, Convair 580, as poor. Runway 3/21 is being plowed at this time." At 07:51, Flight 470 reported at the Henning Intersection and was cleared to contact the Casper Tower. The tower controller cleared the flight to land on runway 25 and gave the wind as 030deg at 8 knots. The flight was also advised by the controller that a disabled snow blower
Snow blower
A snow blower or snow thrower is a machine for removing snow from an area where it is not wanted, such as a driveway, sidewalk, roadway, railroad track, rink, runway, or houses...
was "just west of the intersection runway 21, left side runway 25, on the edge ...." At 07:41:42, the first officer called out "thousand to go to the field." At 07:42:09, the first officer called "approaching minimums," and 12 seconds later, he called "just about at minimums." The aircraft then flew level for a few moments at the minimum descent altitude (MDA). At 07:42:25, the first officer called the runway in sight directly below the aircraft. At that time airspeed was 150 knots and the flaps were at 25deg. The first office then set the flaps at 30deg as the captain initiated the final descent. The aircraft crossed the threshold at reference speed +15 knots. The aircraft touched down 2375 feet from the departure end of the runway, about 6,306 feet from the approach end of the runway. The aircraft went off the departure end of the runway to the right of the centerline. After striking several metal stanchions in the first row of terminal bar lights, which were located 200 feet off the end of the runway, the aircraft struck a shallow irrigation ditch 280 feet off the runway end. The aircraft veered farther to the right and stopped about 800 feet beyond the departure end of the runway. There was no fire and the aircraft was damaged but only four passengers were injured. All 99 passengers and crew on board flight 470 got off the aircraft and survived.
Investigation
The National Transportation Safety BoardNational Transportation Safety Board
The National Transportation Safety Board is an independent U.S. government investigative agency responsible for civil transportation accident investigation. In this role, the NTSB investigates and reports on aviation accidents and incidents, certain types of highway crashes, ship and marine...
sent John H. Reed and he found the failure of the pilot-in-command to exercise good judgment when he failed to execute a missed approach and continued a non-precision approach to a landing without adequately assessing the aircraft's position relative to the runway threshold. Contributing to the accident were the excessive height and speed at which he crossed the approach end of the runway and the failure of other flight crew members to provide him with required callouts." His report into the accident was realised on October 30 1975, 7 months after the accident.