Accident Analysis United Flight 232 Term Paper

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This veering, would place pressure on the right side of the aircraft, which would help contribute to the break up during plane after touching down. To combat this problem, the NTSB recommends that all aircraft have some type of back up flight control and hydraulics system. The presence of such a system could have helped to mitigate the effects of the disaster, by giving the pilots control of the aircraft. During the initial decent, this could have proven vital in ensuring that the pilots were able to successfully reach the runway at Sioux City and it helped to safely land the plane when it was initially touching down. ("United Airlines Flight 232," 1990)

A third issue that helped contribute to the crash of United flight 232 was: problems with the manufacture of engine. During their report, the NTSB found that the engine that was manufactured by GE helped contribute to the initial problems that were encountered. What happened was a titanium intake valve had a crack that could not be seen by the human eye. At the manufacturing facility, GE would perform an initial check for cracks and any kinds of defects during the middle of the manufacturing process, using ultrasonic along with macroetch technology. The problem is that the crack in the metal was developed during the final stage of the manufacturing process. This was the point where the two scans had already been conducted on the aircraft engine. As a result, this lack of quality control would help to create the initial problems that were experienced by the flight crew. ("United Airlines Flight 232," 1990)

To make matters worse, the NTSB found a number of other issues at GE that would help contribute to the problems with the engine the most notable would include: a lack of quality control and accurate record keeping. During numerous phases of the initial testing of the engine and its development there was a flaw that was detected. This was the crack that was found to have occurred at many points during the manufacturing process. Where, the company would use the different ultrasound and macroetch scanners to see if there were any issues with the titanium. The problem began with the fact that if a slight crack was overlooked, the constant heating and cooling that the metal, would cause the weakness to become more severe. As a result, because the company was not constantly scanning for this during the entire manufacturing process, meant that some engines would be shipped with the flaw. Then, the company did not accurately report the flaw that was discovered by engineers in various reports. This caused the supervisors and safety inspectors to not pay as close attention to the problem as they should have. To prevent the situation from becoming worse, the NTSB recommends that GE improve their overall monitoring and quality control. Where, they would use ultrasound and macro technology throughout the design as well as manufacturing process, to find any kind of structural weakness that could exist in the engine. Then, the company must improve their record keeping procedures for reporting structural flaws. This is significant because if the use of such technology had been place, the flaw in the titanium of the intake value would have been discovered. At which point, the company would more than likely would have corrected the problem before the engine would leave the manufacturing facility. The improved record keeping on the various flaws would have allowed managers, inspectors, regulators and the airlines to know that this is an issue that they must be made aware of. At which point, the chances that incidents such as United flight 232 would have been reduced. ("United Airlines Flight 232," 1990)

A fourth major issue that was identified was cabin safety. During the emergency landing, the procedures for infants and small children were unclear. Where, they would be strapped into the seat of airplane using the adult seat belt or they would sit on the lap of a passenger. This is problematic because during an emergency landing, these kinds of restraints or lack there of could contribute to problem, as these children / infants could go flying through the cabin of the aircraft during the confusion.

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At which point, the odds increase dramatically that the child / infant could have a severe fatality or they could injure other passengers. As a result, the NTSB recommends that all some sort of child safety procedure is designed to ensure that they are securely in their seats during the event of an emergency. ("United Airlines Flight 232," 1990)

A fifth area that helped make the situation on the ground worse was: the lack of coordination from first responders. In the NTSB report, the agency commends first responders for immediately going to scene within minutes of the emergency landing. However, the lack of coordination meant that the water truck would be slow to respond to the scene. Part of the reason for this was the difficulty in going through the corn stalks to reach the fuselage of the plane and the delay in sending the truck out to the scene. As a result, firefighters had less water available to extinguish the fire. This is significant because if the water truck had been available immediately after the accident, firefighters may have been more effective at containing the blaze. This could have meant that the overall number of causalities could have been reduced because EMTs would be able to access the plane quicker. To prevent this situation in the future, the NTSB recommends that first responders prepare for various incidents by conducting mock drills and have a response plan prepared for such events. ("United Airlines Flight 232," 1990)

Clearly, United flight 232 highlighted a number of different issues that helped contribute to the overall severity of the situation. This is because a number of different factors helped to make the situation worse the most notable would include: human error at the United maintenance facility when inspecting the engine of the aircraft, DC 10 hydraulic / flight control issues, problems with the manufacture of engine (GE Aircraft Engines), cabin safety and improved coordination from first responders. This is significant because these different factors together would help to make the hopes of having a safe emergency landing nearly impossible. The reason why is: because the weakness in the titanium of the intake valve of the rear number two engine, would have a ripple effect on a number of different systems. Where, a small crack in the titanium would cause debris to go into the fan of the engine. Once this took place, it meant that the engine would see a minor explosion. At which point, the debris would go into the airplanes hydraulics and flight control systems. This is important because the flight crew was having trouble controlling the plane after the incident; which would force them to fly to Sioux City to make an emergency landing. The problem was controlling the airplane during that time, as the flight crew was facing difficulties keeping the nose of the airplane stable and the right side level. During the initial decent this would make the landing very difficult as the flight crew was attempting to keep the aircraft balanced, yet it would continue to veer to the right. At which point, the right wing of the plane would touch down first, as it would break into several different pieces. This is what made the accident far worse than it should have been. The reason why is if the flight crew could have maintained control of the aircraft during the emergency landing, they more than likely would have been able to successfully make it to the runway at Sioux City. This would have mitigated the overall number of fatalities and casualties that were experienced. Especially when you consider the fact that the flight crew had enough total flight time and time with the aircraft to easily achieve this objective. As a result, the NTSB recommended that the airlines begin using technology to scan for cracks in the engine and improve quality control procedures at GE. It is through examining the different causes that contributed to the crash of United flight 232; that provides the greatest insights as to how to successfully conduct an accident assessment......

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