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Aircraft accident causes
Aircraft accident causes
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Cause(s) of Accident
On May 25, 1979 flight 191, American Airlines McDonnel Douglas DC-10-10 departed Chicago O'Hare International Airport (Kilroy, 2002). Flight 191 began its take- off role, shortly after rotation the left number one engine and pylon broke free from the wing (Kilroy, 2002). The engine and pylon assembly rotated upward and back over the top of the wing coming to rest about mid-way down the runway. Due to the departure of the engine and pylon assembly it damaged a large section of the leading edge slats, hydraulics wing surface, and electrical wiring (National Geographic, 2012).
At this point the aircraft was flying wings level at 300 feet Above Ground Level (AGL) with an air speed of 165 Knots Indicated Air Speed (KIAS) (Kilroy, 2002). Following emergency procedures the aircrew began to reduce their airspeed to 159 KIAS; however, the aircraft responded unexpectedly by rolling to the left. This prompted the aircrew to apply full right rudder and aileron inputs to correct the roll and bring the aircraft back to wings level; however, the aircraft continued to roll left (Kilroy, 2002). Now at 400 feet AGL and airspeed of 155 KIAS, the left wing dropped 122 degrees and the nose of the aircraft pitched downward to 21 degrees beyond the horizon. The aircraft impacted the ground short of a trailer park completely destroying the DC-10-10 (Kilroy, 2002).
Structural and Mechanical Factors
The beginning sequence of this accident had begun a month earlier, after American Airlines completed maintenance on the number one engine and pylon assembly (National Geographic, 2012). The assembly required removal from the left wing and was completed without following the prescribed maintenance directives from McDonnell Douglas....
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...ith its engine and pylon maintenance procedures (Hoover & Fowler, n.d.).
References
ASN. (n.d.). Retrieved from http://aviation-safety.net/database/record.php?id=19790525-2
Hoover, K., & Fowler, W. T. (n.d). Studies in ethics, safety, and liability for engineers
Retrieved from http://www.engr.sjsu.edu/~nikos/courses/ae171/AA%20191.doc
Kilroy, C. (2008). Airdisaster.com. Retrieved from http://www.airdisaster.com/special/special-aa191.shtml
King, J. B. (1979). American Airlines Inc., DC-10-10, N011A chicago o'hare international airport chicago illinois (NTSB/AAR-79-17). Retrieved from http://libraryonline.erau.edu/online-full-text/ntsb/aircraft-accident reports/AAR79-17.pdf
National Geographic (2012). Seconds From Disaster S3E15 - Chicago Air Crash American Airlines Flight 191 [Video file]. Retrieved from https://www.youtube.com/watch?v=lEY6HnF1olU
The flight had come in from Van Nuys Airport (VNY), Van Nuys, California. Witnesses recall that the plane had landed and parked at the FBO to receive some fuel. The plane had sat on the ramp for approximately 45 minutes before it took off again. While on the ramp, numerous witnesses recalled snow falling and “contaminating” the wings of the planes. Before the plane had taken off, witnesses said that they did not see either of the pilots inspect the wings for icing conditions and snow buildup. The METAR for the airport was, “wind calm, visibility 1 ¼ miles in light snow and mist, few clouds at 500 feet, overcast at 900 feet, temperature 1°C and dew point -2°C.”(Insert here) The cockpit voice recorder (CVR) recorded the captain asking the pilot, “How do you see the wings.” The first officer replied, “Good.” And the captain said back, “Looks clear to me”.(Insert here) The captain turned on the engine bleeds which help keep icing conditions down. A downfall with engine bleeds is that they reduce the take off distance. The captain then proc...
An Eastern Air Lines Lockheed L-1011 crashed at 2342 eastern standard time, December 29, 1972, 18.7 miles west-northwest of Miami International Airport, Miami, Florida. The aircraft was destroyed. Of the 163 passengers and 13 crewmembers aboard, 94 passengers and 5 crewmembers received fatal injuries. Two survivors died later as a result of their injuries.
Debunking the 9/11 Myths: Special Report - The Planes - Popularmechanics.com. (n.d.). Automotive Care, Home Improvement, Tools, DIY Tips - Popularmechanics.com. Retrieved April 26, 2010, from http://www.popularmechanics.com/technology/military/news/debunking-911-myths-planes
The Colgan Air Flight 3407 was a very interesting case to look at. On February 12, 2009, at 10:17 pm, flight 3407 crashed at a house in New York after the pilots experience a stall. Flight 3407 was scheduled to fly from Newark, New Jersey to Buffalo, New York. The NTSB reported the cockpit voice recorder (CVR) revealed some discrepancies both pilots were experience. The first officer did not have any experience with icing condition but icing was one of the reasons the plane went into a stall. On the other hand, the captain had some experience flying in icing condition. The captain was experiencing fatigue, which indeed, made him unfit to recover from a stall. With that in mind, the Human Factor Analysis Classification System (HFACS) will give insight of some errors both pilots made.
Although the flight was scheduled to depart from JFK Airport at about 7:00 p.m., it was delayed due to a disabled piece of ground equipment and concerns about a suspected passenger mismatch with baggage. The airplane took off at 8:18 p.m., shortly at 8:25 p.m., Boston air route traffic control center (ARTCC) instructed the pilots to climb and maintain an altitude of 19,000 feet and then lower down to 15,000 feet. However, at 8:26 p.m., Boston ARTCC amended TWA flight 800's altitude clearance, advising the pilots to maintain an altitude of 13,000 feet. At 8:29 p.m., the captain stated, "Look at that crazy fuel flow indicator there on number four... see that?" One minute later Boston ARTCC advised them to climb and maintain 15,000 feet to which the pilot replied: “Climb thrust”. After an extremely loud and quick sound, the cockpit voice recorder stopped recording at 8:31 p.m. At that moment, the crew of an Eastwind Airlines Boeing 737 flying nearby reported an explosion in the sky. TWA Flight 800 aircraft had broken up and crashed into the sea, 8 miles south of East Moriches, killing all on board. (1,2)
September 11, a turning point in the United States history. This event caused various negative impacts on the aviation industry. It changed the way airports and airlines organized themselves completely. The effect was so strong that it caused bankruptcies, people to lose their jobs, changes in how flights were made and flew, and security checking’s. This day also created fear and psychological issues on individuals concerning anything to do with flying on an airplane. In other words, this day was a catastrophe in the aviation industry in the US.
Flying debris caused many injuries like tornadoes. A fire storm of winds followed the detonation
...der was designed to hold a pilot on his stomach in the center and would control the movement of the craft through a process that would become known as "wing warping". (Cite) On a windy day, the brothers tested their glider. Wilbur was the pilot while Orville and a man named Bill Tate held ropes that would steady the glider like a kite. The craft was successful and lifted fifteen feet off the ground. (Cite) After the successful flight though, the brothers ran into a slight set back. While adjusting the glider, a wind lifted the craft off the ground and the glider was smashed onto the ground a few yards away. This crash was not the last setback the wright brothers experienced. After many successful flights later on, the brothers began to look for a way for the glider to be self-powered, and not have to rely on the wind. Their glider needed a propeller and an engine.
Martin, M.W. and Schinzinger, R. (2005) Ethics in Engineering. 4th ed. New York: McGraw Hill.
On February 1, 2003, the Space Shuttle Columbia was lost due to structural failure in the left wing. On take-off, it was reported that a piece of foam insulation surrounding the shuttle fleet's 15-story external fuel tanks fell off of Columbia's tank and struck the shuttle's left wing. Extremely hot gas entered the front of Columbia's left wing just 16 seconds after the orbiter penetrated the hottest part of Earth's atmosphere on re-entry. The shuttle was equipped with hundreds of temperature sensors positioned at strategic locations. The salvaged flight recorded revealed that temperatures started to rise in the left wing leading edge a full minute before any trouble on the shuttle was noted. With a damaged left wing, Columbia started to drag left. The ships' flight control computers fought a losing battle trying to keep Columbia's nose pointed forward.
They took off without any problems. The weather was pleasant and they were fully equipped and ready. Until 3:45 p.m., the tower operators in Fort Lauderdale received a bizarre message from the flight leader, Lt. Charles Taylor. Lt. Taylor reported that they could not see land and that they were off-course. He also reported that they were lost. Baffled, the tower operators told Lieutenant Taylor to go westward, but he answered that they did not know which way west was.
The excitement among people was cut short by the unfortunate delay in flight, because of maintenance on one of its engines. The passengers boarded the plane a couple of hours after the scheduled time. Finally, it was cleared for taxi on runway 26-Right. The pilots lined the aircraft parallel to the runway. A tragic accident, however, was about to happen.
More then three years ago the Space Shuttle Columbia went down in flames, due to the damage caused but not limited to, a piece of insulating foam that broke off the external tank and struck the wing's leading edge. The foam struck with enough force to create an opening in the wing which allowed hot plasma to enter during reentry. No one thought that foam could cause this much damage since nothing like this had resulted from previous instances where the foam had come off.
Simmon, David A. (1998). Boeing 757 CFIT Accident at Cali, Columbia, Becomes Focus of Lessons Learned. Flight Safety Digest.
McLaren, B. (2010, July 22). The ethical responsibility of engineers and the rest of us, too [Web log article]. Retrieved from http://www.huffingtonpost.com/brian-d-mclaren/the-ethical-responsibilit_b_653812.html