Effects of Severity of Accidents
The National Transportation Safety Board (NTSB) carried out research that happened over the period from 2001 to 2010 relating to civil aviation accidents on the commercial air transport sector. The air carriers fly large, transport aircraft engaged in revenue operations involving the transportation of both passengers and cargo.
The operators generally conduct operations in controlled airspace and controlled airports that provide specific weather, navigational, operational equipment and maintenance support. This article provides a meta-analysis done on the original data involving the broad categories of civil aviation accidents and the kinds of operations, the types of aircraft, and the pilots involved in them.
|Mean per Year||11.3||7.8||13.5||7.3||10.0||8.3||7.0||7.0||7.5||7.0|
Table 1: Categorisation of Severity of Accidents from 2001 – 2010, Mean and Standard Deviation
Table 1 illustrates the total civil aviation accidents for commercial air transport sector that occurred from 2001 to 2010. From Cohen's, there was a small delta of 0.2 to 0.3 which has a small effect. From Table 1, the severity of accidents has declined over the decade and the severity is either injury or damage. This shows that through the discipline of flight safety, the frequency and severity of aviation occurrences have declined significantly. Accident prevention is everyone’s responsibility which includes international organizations, major aircraft and power-plant manufacturers, state regulatory authorities for civil aviation, owners and operators, maintenance organizations, industry and professional associations, aviation education and training institutions. Table 1 shows a normal distribution as the data is perfectly normal.
|Contributing Factors||No. of Aircrafts||Percentage %||Means Difference|
|Turbulence Encounter||8||25.8||No significance|
|Ground Collisions||5||16.1||No significance|
|Ground Handling||4||12.9||No significance|
|Abrupt Manoeuvre||2||6.5||No significance|
|Cabin Safety||2||6.5||No significance|
|System Failure||2||6.5||No significance|
|Other Collision||2||6.5||No significance|
Table 2: Contributing Factors, No. of Aircraft, Percentage, Means Difference, Mean, Mode and Standard Deviation in 2010
Table 2 displays the contributing factors and number of aircrafts accidents for commercial air transport sector in 2010. The most predominant cause of accident was turbulence encounter. Turbulence encounters accounted for more than a quarter of the accident events. The next cause of accident was ground collision when one of the aircraft involved is taxiing to or from a runway. The mode is the most frequent score in the data set. However, on a histogram, it represents the highest bar which is turbulence encounter. Turbulence encounter may occur without warning thus it is difficult to minimize the accident. For the rest of the contributing factors, it can be reduced. This indicates that if crew resource management and accident prevention are put in place, it is possible to achieve zero accident. Table 2 shows that the data are normally distributed as the data distribution is continuous and symmetrical.
From Table 2, the comparison of the contributing factors is not significant difference when p value <0.05.
The purpose of this study is to determine number of civil aviation accidents on the commercial air transport sector annually and determine the factors which lead to these accidents.
Research on the severity of civil aviation accidents in the commercial air transport sector.
A list of total civil aviation accidents for commercial air transport sector that occurred from over the decade between 2001 and 2010. The number of accidents happened in 2010 are categorised to the individual factors that contributed to the accidents.
Descriptive statistics was used for data analysis. The meta-analysis provides further descriptive statistics such as central tendency, dispersion and effect size.
Description of contributing factors
|Turbulence Encounter||Motion of air caused by changes in air currents|
|Ground Collisions||Ground operations when one of the aircraft involved is taxiing to or from a runway|
|Ground Handling||Ground handling, jet blast, near collision on ground with aircraft or vehicle, propeller strike, or runway incursion|
|Birdstrike||Bird or animal strike|
|Abrupt Manoeuvre||Inappropriate execution of flight planning decisions. Mishandling of the aircraft including unnecessary manoeuvres and inappropriate emergency responses|
|Cabin Safety||Crew illness or incapacitation|
|System Failure||Aircraft systems including fuel, instrument air power, and pressurization|
|Other Collision||Other accidents|
|Unknown||Intentional damage and inaccurate metrological information|
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