The Ariane Flight Failure was a situation in which the self-destruction of a space-faring rocket was caused by a failure in proper software testing. Below we’ll give a brief overview, some problems that happened, and I will be giving my own thoughts on this. We’ll then wrap up and move to describing a test cases which could have been used to prevent failure. To begin, the Ariane-5 Rocket was due to enter space, but during the launch sequence, the craft swiveled out of control, broke up, and then exploded. The events that lead up to the explosion were simple: There was a nominal and smooth launch up to H0-36 seconds, then at around H0-36.7 seconds the Inertial Reference Systems ceased to function. The backup IRS was also down. Two nozzles of the solid rocket boosters swiveled into the extreme position, which then caused the rocket to abruptly veer off course. The rupture of the links between the solid boosters caused the self-destruct sequence to correctly begin (but prematurely). The initial failures were that the on-board computer used calculations sent by the IRS, but these calculations were actually output of an exception …show more content…
For one, the most important issue that I saw was that 3 of the 7 variables which could produce operand errors were unprotected. In the report, the groups found that it produced a high margin of safety. However, this shouldn’t be assumed like this. A high margin of safety still has a certain marginal chance of fault. This needs to be compensated for in the event that it does fail (as it did). Secondly, the specifications actually required that the processor of the IRS should shutdown on fault. Yet another error in specification requirements. Thirdly, the software used by the Ariane-5 was also used by the Ariane-4, but was not updated to compensate for the changes made to the A-5. Honestly, this could have been prevented with the proper test cases implemented, which will be covered:
Click here to unlock this and over one million essaysShow More
The crash investigators found that all three left-side static ports were covered with metallic tape prior to washing. The mechanicians forgot to remove tapes and pilots did not see that when they were doing external investigation prior to take-off. Because all three static ports were covered, the sensors could not measure outside air pressure and, thus altitude and speed.
Highlighted in their code of conduct, clear and concise internal regulations and expectations concerning operational safety are outlined to provide company-wide compliance (Sustainability Report, 2015). Additionally, these regulations are substantiated by the company’s three levels of verification, which are labeled as self-verification (individual site corroboration), assurance (internal risk assessment team), and audit (independent verification) (Sustainability Report, 2015). While the first two internal systems are vital to the success of the intended safety strategies, the presence of the company’s independent assessment team assures an accurate and non-biased portrayal of compliance information, which validates the company’s transparency efforts. The company’s appointment of Carl Sandlin as their Independent Expert was intended to assist in the implementation of recommendations set out by an internal investigation, which the company has completed 25 out of 26 sanctions (BP, 2012; Sustainability Report, 2015). Moreover, these developments may be a result from past allegations that BP’s auditing systems only accounted for a safety system presence and failed to assess the quality of their structures, verification of correct usage, and system efficiency (Allford & Carson, 2015). Although the cause for these developments resulted from tragic events, these internal improvements provide authenticity to the company’s transparency and create a foundation for company-wide safety compliance in both current and future business endeavors. For example, BP has successfully screened 19 potential projects for their impact on the local communities and environment (Sustainability Report, 2015). However, their ultimate success is derived on their ability
Firefighters extinguished the fire and then shut down the locomotive. When the locomotive was shut down, no other locomotive was started. This meant that the air compressor was left off while the air brakes were slowly leaking. The train’s “reset safety control” system, which sets the entire train’s brakes should the engine fail, was not wired to go off. About an hour after firefighters shut down the train, the pressure in the air brakes had dropped low enough to allow the train to start rolling. The derailed 17 minutes later when it was 11.6 kilometers (7.21 mi)
Reported by (McCown, 2013), the Instrument Landing System (ILS) was not switched on and the crew are unable to use instrument to align the aircraft with the runway. This has resulted in the crew to have flown above the standard height for approach, needing a sudden drop in both speed and altitude when the aircraft is near the airport. When the crew was decreasing altitude and speed, they allowed their speed to drop significantly below the approach speed causing the aircraft to further lose altitude and crash. This was due to the crew not using the aircraft’s auto throttle system to control airspeed.
The boeing 777 sped toward the earth at speeds increasing from five hundred miles per hour with a top speed of five hundred and ninty. Jim, the pilot was working the controls, he was an experienced airman who had over seventy-five thousand hours of flight experience, that is about three thousand one hundred and twenty five days of flight, while Josh his co-pilot was just a rookie airman with a third of the hours as Jim. The plane had three hundred and seventy five passengers on board, which were all freaking out because one of the only two engines went out half way to Madagascar. The plane, which is out of radio range, is flying above the middle of the Indian ocean right off the East coast of Africa. They still had one hundred and seventy miles to go.
The “Space Shuttle Challenger Disaster” was an event that was bound to happen. Unfortunately, seven astronauts lost their life in a failure that could have easily been prevented. The failure of the rocket booster O-rings gave way to gas leaks through the external fuel tank which caused the explosion. NASA has came a long way since 1986, however history cannot be erased. In my opinion, this failure traces back to the management. It doesn't make sense to me that an O.K. to launch was given after insufficient testing, lack of communication, and disapproval from others involved in the build. The wrong people must have been given the wrong responsibilities. After reading the background, I can only think that the ones in charge were racing with time, considering economic & political
Bob Ebeling and Mark Boisjoly were both engineers and are best known as the main people who tried to cancel the launch. The O-ring problem at lower temperatures wasn’t something we later learned. Ebeling knew that given low enough temperatures it would fail and cause the main tank to explode. However, “Problem reporting requirements are not concise and fail to get critical information to the proper levels of management. Little or no trend analysis was performed on O-ring erosion and blow-by problems.”
Through data collection and analysis of the crash site, the investigation team has found the most accurate answers to the events of the plane crash. They have used empirical and molecular formulas to do so. An empirical formula is the lowest whole-number ratio of all of the elements in a compound. A molecular formula is the ratio of a molecule’s elements, sometimes it can be the empirical formula of the molecule. These terms were used to find the correct substances found on the plane crash and on the victims.
The significant engineering failure that will be analyzed is the Space Shuttle Challenger. In 1986, the Challenger faced many launch delays. The first delay of the Challenger was due to the expected weather front and presence of the Vice President (ENGINEERING.com). Since rain and cold temperatures were expected to move into the area, they didn’t want the Vice President to make unnecessary trips.
The cause for the American Airlines 191 crash was the stall with its roll to the left. The stall was created by the left wing outboard leading edge slat retraction. This caused the loss of stall warning alarms and the failure of the slat indication systems that were supposed to indicate changes between the left and right wings and inboard-outboard slats. The maintenance group caused damage to the left wing and engine number one separation. The improper maintenance procedures led to the separation of the engine and pylon assembly.
On December 17, 1903 Orville Wright and Wilbur Wright became the first Americans to succeed with the first powered flight, being in the air for fifty-seven seconds with an average speed of thirty-one miles per hour (Telegram). Two guys from Dayton, Ohio were able to solve the navigation problem that was baffling the human generation for years. These brothers encountered several failed attempts before they were successful, but those failed attempts led to discoveries and those discoveries led to new solutions to the problems they faced. Once they had mastered the skill of flight, the brothers went about to make advances to the airplane, to better the takeoff, flight, and landing. The Wright brothers were very successful with the flight of airplanes
Every company has more issue than you think. United Airlines is the American international airline routing North America, Latin America, the Caribbean, Europe and Asia. The air carrier’s parent company and United Continental headquarter for holding are in Chicago. (Darshana, 2012) In 1929, William E. Boeing, Frederick B. Rentschler, and their associates founded United Aircraft Transport Corporation which is a corporation of aircraft manufacturing and air transport.
When I stepped into the large neatly organized white polished plane, I never though something would go wrong. I woke up and found myself on an extremely hot bright sunny desert island filled with shiny soft bright green palm trees containing rough bright yellow hard felt juicy apples. The simple strong plane I was in earlier shattered into little pieces of broken glass and metal when crashing onto the wet slimy coffee colored sand and burning with red orange colored flames. After my realization to this heart throbbing incident I began to run pressing my eight inch footsteps into the wet squishy slimy light brown sand looking in every direction with my wide open eyes filled with confusion in search of other survivors. After finding four other survivors we began moving our small petite weak legs fifty inches from the painful incident. Reaching our destination which was a tiny space filled with dark shade blocking the extreme heat coming from the bright blue sky, I felt my eyelids slowly moving down my light colored hazel eyes and found myself in a dream. I was awakened the next day from a grumbling noise coming from my empty stomach.