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Analysis of Failure States of Functional Systems of Aircraft Such as Boeing 737 in the Airline

Terescenko Jevgenijs, Shestakov Vladimir, Vaivads Andris

Transactions on Aerospace Research

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2023

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Nr 4 (273)

71--78

EN

The article presents the results of analysis of failures of the main functional systems units of aircraft Boeing 737 during the last 10 years of its operation in the national airline of Latvia ‘Air Baltic Corporation’. Total flight time was T∑ = 322,529 h and 184,538 cycles [1]. These data were obtained from daily reports of defects and unplanned consumption of spare parts for these systems. Failures of instrumental equipment of avionic systems were investigated in detail. Based on calculations of their failure probability and component replacement frequency, a comprehensive system including measures and their technical and instrumental support has been developed to improve maintenance productivity. Such a system requires relatively inexpensive components, is simple and can be used in the operation of this type of aircraft.

2

Ship fires caused by primary failure of the fuel filter of the engine driving the generator

Monieta J.

Zeszyty Naukowe Akademii Morskiej w Szczecinie

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2016

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nr 47 (119)

36--41

EN

This article presents selected results of investigations on adverse events of ships throughout one year. The investigations included mainly merchant vessels used to transport bulk material and heavy objects. Ships have been divided into functional systems and elements and into navigational and machine parts. An attempt was made to classify the causes of accidents and evaluate material losses. The quantitative analysis of the causes of the events leads to different conclusions than those reached on the basis of the analyses of losses. Although the failures on-board the vessel occurred more frequently, the costs of machine adverse events were larger. The most critical consequences was fire of a ship caused by loosening of the bleed screw of the fuel filter. Auxiliary engines of the vessel were operated in different external and internal conditions, and were fed by distillation fuel. As a consequence, the evacuation of the crew and fire suppression were required, using the CO2 installation of the ship. The ship was stopped and deprived of its primary sources of electric energy. An analysis of the event was along with the elaboration of a plan of preventive measures. The results should be useful for selecting the monitored diagnostic objects of vessels.

3

Estimation of undesirable events in operation of bulk carriers

Monieta J.

Journal of KONES

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2013

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Vol. 20, No. 2

291--297

EN

This paper describes the introduced results of researches of undesirable events at one shipowner for a period of twelve years. The study included mostly merchant vessels bulk carriers and their significant objects. The ships were decomposed on functional systems and elements also divided them into of the navigation and machinery part. There was carried out a quantitative and economics analysis. In the economic analysis have been exchange rates accounted. Attempted classification of the causes of the event and its participation in material losses incurred. These events are also a threat to human life and health as well as the natural environment. One showed on methods and means of diagnostics as manner of limitation their sizes and results. The results should be useful in the design of diagnostic experiments to select the objects that should be subject monitored. The larges losses of adverse events were initiated in the functional systems: navigation, main drive and cargo. The most often adverse events are collisions. The most expensive vessel objects in the engine room proved to be reciprocating internal combustion engines for main propulsion and auxiliary. The investigations were conducted for all types of reciprocating internal combustion engines mounted on the test vessels. Combustion engines were operated under different external and internal conditions and were feed distillate and residual fuel oils.