A Model of Interconnection Between Aircraft Equipment Failures and Aircraft “States” in Flight

Abstract

The article presents a semiotic model of “aircraft conditions” in flight and multilevel structures of an aircraft. The hierarchical structure of abstract models is divided into blocks and levels that make them more compact by applying a mathematical apparatus corresponding to the goals sated. The above models were tested on the basis of statistical data on TU-154 aircraft failures for 10 years. Various aircraft functional system failures in flight were examined. The state of the aircraft is identified by normative indicators recorded in the “Aircraft Technical Operation Manual”.

Algorithm for Analyzing Deviations and Irregularities in the Functioning of the Airline's Structural Units and Personnel in the Face of Uncertainty

“…The higher the quality (less violations, deviations), the higher the safety of flights (less risk/hazard factors, potential threats). It is generally believed that in aviation, depending on the severity of the consequences, there are four types of negative events (Bogdane et al, 2018;Vaivads et al, 2018):…”

Analysis of Approaches to Assessing Flight Delays Due to Technical Issues at Airline Network Airports Within the Operational Management Framework

“…Definition: By "state of the aircraft in-flight," we mean situations that arise when an aircraft is in a normal flight mode, but affected by one or more adverse factors, leading to diminished level of flight safety l. In this context, adverse factors are exclusively considered as failures of aviation equipment [10,11].…”

“…In general, the "state of the aircraft in-flight" encompasses a combination of aircraft properties and psychophysiological indicators of pilots, which are subject to change due to the impact of adverse factors affecting the aircraft, leading the flight mode to deviate from the "normal" state. Regulatory documents categorize these deviations as "special situations" [10,11]. According to these documents, there can be four potential special situations in flight: complicating flight conditions (CFC), a complex situation (CS), an emergency situation (ES), or a catastrophic situation (CatS), see Fig.…”

Assessment of the Degree of Danger Posed by In-flight Contingencies When Exposed to Adverse Factors Affecting the Aircraft

“…In the Airworthiness Standards, such situations are classified as special situations. They are divided into four categories: complication of flight conditions, difficult (dangerous) situation, emergency, catastrophic situation [6], [7]. Special flight situations are characterized by a combination of aircraft properties and psycho-physiological indicators of pilots when such indicators differ from the normative ones and the flight mode differs from the "regular" one.…”