Northwest Airlines Flight 85 is a flight from Detroit Metropolitan Wayne County Airport to Narita International Airport which suffered lower steep hardening events on October 9, 2002 when the flight was near Anchorage, Alaska. Hardover steering is when the steering wheel of a plane turns into a travel limit without the crew input. Hardover gives the full left full steering wheel, requiring the pilot to use the top right and right aileron steering to maintain the attitude and of course.
Flights are diverted to Ted Stevens Anchorage International Airport. No passengers or crew were injured, but the incident resulted in an airworthiness directive to prevent possible future accidents.
The aircraft involved was the first production of Boeing 747-400 (Boeing 747-451, c/n 23719, reg N661US) built by Boeing and shipped to Northwest Airlines as a customer of this launch on December 8, 1989.
Video Northwest Airlines Flight 85
Incident Flight
Flights depart Detroit Metropolitan Wayne County Airport at 2:30 PM Eastern Daylight Time. The incident happened at 5:40 pm Alaska Summer Time. At the time of the incident, Junior Captain Frank Geib and First Officer Mike Fagan had just mastered the plane, allowing Senior Captain John Hanson and First Officer David Smith to rest. Flight 85 captain said that the incident took place at the 350 (35,000 ft/11,000 meter) flight level.
The aircraft suddenly enters the left bank 30 to 40 degrees. Initially Geib believed that engine failure had occurred. Hanson reentered the cockpit, and continued flying the plane by hand with Fagan. Geib declares a state of emergency and initiates a transfer to Anchorage. While attempting to declare a state of emergency, the plane was in a dead zone of communication between North America and Asia. Even with a weak signal, they contacted another Northwest Airlines flight, Flight 19, which helped Flight 85 declare a state of emergency as they are closer to Alaska. Flight 85 captain reported that no emergency procedures were available that could fix the problem. The pilot set up a conference call with Northwest Airlines in Minneapolis-St. Paul's area, and Northwest employees could not find a solution for the bank that suddenly. The crew took back control of the plane and landed at Ted Stevens Anchorage International Airport. To direct the aircraft they must use asymmetric machine push, or various inputs into the machine; they can not use ailerons at the time.
Hanson says that crew resource management (CRM) contributes to safe landing flights in Anchorage; he said "This is a classic application from CRM We are blessed and fortunate that we have a full crew augmentation We have four pilots to work together in the cockpit We have a group of outstanding flight attendants, which becomes important later as we give this explanation as a 'red' emergency, which means there is at least a good chance you should evacuate.We are not sure we will be able to keep the aircraft on the runway. "The incident initially did not receive media attention.
Maps Northwest Airlines Flight 85
Investigation
National Transportation Safety Agency (NTSB) and Boeing launched an investigation into the incident. The NTSB investigator, Carolyn Deforge, who oversaw the NW85 investigation, said in the Mayday Airborne Air Space Investigation Air Emergency ) program that appears to be an event which is very dramatic, and... it certainly looks like something we need to follow up, trying to understand what has happened. "
NTSB found that there was a fatigue crack in the power control module, and it was not possible to visually inspect the type of failure. The cast metal housing of the lower steering control module has been damaged. The final part of the housing control module that holds the yaw-reducing actuator has been separated from the main part of the housing. Deforge said in the Mayday episode that the failure of the NW85 was an unusual failure because most failures were internal components rather than housing itself.
The NTSB decided that the possible cause was "fatigue fracture from the lower steering wheel manifold module, which resulted in a lower steering drive." At the wheel, the steering hardmer is pushed into full deflection and remains there.
Legacy
Boeing
A non-destructive inspection process for modules is developed. As a result, Boeing issued Alert Service Bulletin 747-27A2397. The bulletin, dated July 24, 2003, recommends that Boeing 747 operators perform ultrasonic inspections of low power control modules and over steering expires.
FAA
The Federal Aviation Administration (FAA) publishes the Proposed Rulemaking Notice (NPRM) for airworthiness orders that will make this inspection mandatory on Boeing 747-400, 400D, and 400F planes. The "Boeing Model 747-400, -400D, and -400F Series Airplanes" was published in the federal list on August 28, 2003. The Directive, label Directive 2003-23-01, was issued on 3 November 2003 and became effective on December 18 2003. Since then it has been replaced by the 2006-18-17 directive, issued 30 August 2006 and effective 13 October 2006. In 2008 the proposed replacement for this directive was published.
Events later
In January 2004, the Airline Pilot Association awarded the "Superior Airmanship Award" to Northwest 85 crew.
On February 24, 2009, the aircraft involved in the incident, along with other 747-400s in the Northwest Airlines fleet, joined the Delta Air Lines fleet as part of a Northwest-Delta Air Lines incorporation. On September 8, 2015, he left Honolulu, Hawaii for his last flight and retired upon arrival at Atlanta, Hartsfield-Jackson Atlanta International Airport. It was moved to nearby Delta Flight Museum to be showcased at the end of April 2016.
Dramatization
The Discovery Channel Canada/National Geographic TV series Mayday shows an incident in the 11th episode titled "Turning Point" .
See also
- United Airlines Flight 585
- US Aviation Flight 427
- Eastwind Airlines Flight 517
- American Airlines flight 1
References
External links
- "Air Disaster: SEASON 3: EPISODE 5 Turning Point" (Video) - Smithsonian Channel.
- Hansen [ sic ], John. "How I Saving A 747 From Crashing." Jalopnik . (Archive)
- Boeing 747-400 Arrive in 2016! - Delta Flight Museum
Source of the article : Wikipedia
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