This article defines the typical damage to components of turbine engines, highlighting the differences between them and indicating possible causes. The distinction between various types of defects helps to explain the occurrence and supports personnel in defining the most suitable maintenance action to be performed. The defects described below are common in high-airflow turbine aviation engines...

At CONTEXT’99, the author described the ATT-Meta context-based system for (a) reasoning uncertainly about agents’ beliefs and (b) performing some of the uncertain reasoning needed for the understanding of metaphorical language. ATT-Meta’s handling of uncertainty is qualitative, and includes provisions for adjudicating conflicts between different lines of reasoning. But most of the detail on con...

PROBLEM There is concern in the aviation community that pilot schedules can lead to fatigue and increased chance of an aviation accident. Yet despite this concern, there is little empirical analysis showing the relationship between pilot schedules and commercial aviation accidents. This study attempts to demonstrate an empirical relationship between pilot schedules and aviation accidents. MET...

In the continuous effort for ensuring increasing levels of safety, it is of utmost importance to understand the reasons behind the occurrence of operational errors. In this contribution, we propose the use of the Trajectory Synchronization Likelihood metric for the analysis of two types of events: situations resulting in a reduced separation between aircrafts, and situations that might have res...

Over the last decade, the demand for domestic and international flights in Korea has increased substantially. To meet the strong flight demands, several low cost carriers have begun to offer flight services. In addition, full service carriers have been motivated to establish their own subsidiary low cost carriers to maintain their market share against rival low cost carriers. This paper studies...

In conventional “vehicle-focused” aircraft design and manufacturing, aircraft are optimized for a given mission and then manufactured using custom-built tooling. This strategy ensures the highest vehicle performance for any given mission but is inflexible in that accommodating new missions requires the production of new tooling, a time-consuming and expensive process. An alternative, “Adaptable...

With the growth of commercial aviation over the last few decades there have been many applications designed to improve the efficiency of flight operations as well as safety and security. A number of these applications are based on the gathered data from flights; the data is usually acquired from the various sensors available on the aircraft. There are numerous sensors among the electrical and e...

This paper presents a method to synthesize aircraft noise. The method provides designers with a tool for sound quality evaluation with which target sounds for future aircraft design can be developed. Quick and economic evaluations concerning the quality of sounds of different design alternatives or improvements on existing aircraft become possible. The method has the potential to become a cruci...

Acoustic sensor arrays can be used effectively to provide situational awareness and perimeter defense against small low-flying threat aircraft. Being small and flying low, these aircraft can elude radar detection. However, similar to heavy ground vehicles, these small aircraft emit strong harmonic lines that can be detected and tracked (bearing) at long range. Experimental results from a 16-ele...

In the general aviation (GA) community, an automated aircraft is generally comprised of an integrated advanced avionics system consisting of a primary flight display (PFD), a multifunction display (MFD) including an instrumentcertified global positioning system (GPS) with traffic and terrain graphics, and a fully integrated autopilot. This type of aircraft is commonly known as an advanced avion...