Arene 5 Rocket Disaster

Testing of the entire system will be performed to verify that all parts and counterparts are functional. This is the testing that is made prior to release. Tests performed in this stage verify for the following:

Test Plan: The software is tested using two levels of testing viz. black box testing and white box testing. White box testing could be carried out in three different phases viz. unit testing system/integration testing and validation testing. • Unit Testing: Unit testing, also known as Module Testing, focuses verification efforts on the module. The module is tested separately and this is carried out at the programming stage itself.Unit Test comprises of the set of tests performed by an individual programmer before integration of the unit into the system. Unit test focuses on the smallest unit of software design- the software component or module. Using component level design, important control paths are tested to uncover errors within the boundary of the module. Unit test is white box oriented and the step can be conducted in parallel for

Testing is the next phase of the implementation phase. A comprehensive testing program includes a stepwise process starting with unit testing, followed by testing of group components called integration testing and concluded with entire systems test (Satzinger et al., 2004, p. 640). Individual units or modules are tested prior to integration with more advanced modules, using driver modules. Once a set of modules are put together, integration testing can take place. These test include checking for interface compatibility, run-time exceptions, parameter values and unexpected state interactions (Satzinger et al., p. 644-645). Jeff Theobald suggests that an effort should be made to concentrate not on just errors in a single application or module, but also the system as a whole and between systems (Theobald, 2007). After these tests are completed, the project goes on to system testing. System testing often involves daily “build and smoke” tests, where the system is set to run and is observed for “smoke” or errors (McConnell, 1996). The TPI credentialing system was tested in this manner. The project made it through the first two testing

On January 1986, the Challenger Shuttle blew up shortly after it took off. The accidents took seven lives including aerospace engineers, the specialties pilot, and scientists. The tragic accidents occurred 73 seconds after the flight and caused by the fuel leak from one of the two Solid Rocket Boosters. The explosion represented one of the most significant events in 1980s. However, 17 years after the explosion of the Challenger Shuttle, the Shuttle Colombia also had an in-flight explosion leading to the loss of seven lives.

Luckily there were pictures and videos for the investigation. On one picture right before the launch you could see a little smoke coming out of the right Solid Rocket Booster. People also found plume coming out of the SRB (Solid Rocket Booster) at T+ 58.788 seconds. Plume is a column of one fluid moving through another. Basically, plume is the stuff that comes out of the bottom of the rocket is in the air. At T+ 64.238 seconds the plume started to change shape. That indicated that there was a leak in the liquid hydrogen tank.

The space shuttle challenger disaster took place on January 28, 1986. It was a space launch mission conducted by NASA which failed and exploded in air just 73 seconds after liftoff. The seven member crew in the space died. It is said that they did not die on the initial explosion but later after the Challenger landed. The tragedy and its consequences attracted wide media attention

On June 1st, 1999 American Airlines flight 1420 experienced a tragic accident that claimed many lives and made an impact on aviation worldwide. The event and it subsequent investigation shed

A case study of the GTRE GTX-35VS Kaveri engine is being done to look at the engine that was developed over the 25-year programme, and the shortfalls of the engine design are being analysed using information, and documents that have been declassified. The Kaveri project has now been disbanded, and has been used as the foundation point for the successors being called the K9+ and the K10, being developed for the Advanced Medium Combat Aircraft (AMCA), and the final version

Through comprehensive analysis, we identified the root cause of the explosion of Challenger space shuttle. We referred www.nasa.gov and many other websites to learn more about the Space Shuttle Challenger Disaster and gather domain knowledge. We referred the NASA report “http://history.nasa.gov/rogersrep/genindex.htm” to go in depth of the Space Shuttle concept and development phases. All the issues with the project can be categorized into two problem groups. Mechanical and administrative problems. The direct cause of the Challenger explosion was technical - faulty O-rings. But, the decision to launch the Challenger despite the identified risks was a combination of poor communication and a difference in the evaluation of the risk. We are sure

10 minutes after take off the cargo door on the underside of the plane opened and got ripped off. The cause for this was the locking pins that were supposed to lock in the latch on the plane locked, but the latch had not latched onto the bar so the plane's cargo door was not locked and due to the g-force on the plane during takeoff and ascent into the sky the door was compromised. This event caused a chain reaction of events to occur. After this happened the pressure from the outside acclimated with the cargo bay which caused there to be too much of a pressure differential between the cargo bay and the cabin. This caused the floor of the cabin to collapse, which then broke all three of the control cables.

There were four people on board the airplane and only one suffered minor injuries during the landing. Poor visibility and low ceiling kept the pilot from landing at the airport in Beckley, West Virginia. The airplane was damaged extensively during the crash. As with NTSB accident DEN06LA036, Poor aeronautical decision making, lack of proper flight planning and VFR flight into IMC were cited as contributing factors to this accident as

It started with a leak in tank number four. The tank can contain 90 million cubic feet of natural gas. It has placed near Lake Erie between hundreds of other storage tanks. The leak occurred because of a huge technical failure. The engineers messed up in designing the gas holders correctly [2]. The wind pushed the gas vapor to the city and dropped it into the street sewerage. The mixed gasses in sewerage line caused the disaster. After several minutes of the explosion, another storage tank exploded and left many victims behind [3].

Despite the fact, allows without evaluation system regulatory install Ariane 4 into it which the position of the operation was not for Ariane 5 and also not tested as properly as required. Even though the attitude and trajectory of the rocket are measured by a computer- based inertial reference system (Lions, 1996).But the software into this system was not correct for success. This transit commands to the engines to maintain attitude and direction, the software fails and the system and the backup system shot down as a result and also the diagnostic commands were transmitted to the engines which interpreted them as real data and which swiveled to an extreme position resulting in unforeseen stresses on the rocket.

Designing of test system and explain the Result by simulation using MATLAB with PSAT toolbox, which is used for analyze the system.

– Test cases are not that simple. A test case may consist of a sequences of • The outcome depends both on the current state of the system and the current input • ATM example: