<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>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<sub>∑</sub> = 322,529 h and 184,538 cycles [<xref ref-type="bibr" rid="j_tar-2023-0024_ref_001">1</xref>]. 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.</p>
</abstract>

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.

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

Transactions on Aerospace Research

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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...

No.	Name of object	Part number	Number of components replaced	t (h)	ωt	P(t)
1	Mach Airspeed indicator	2083-11-1	126	100300500	1.95 · 10^–25.85 · 10^–29.76 · 10^–2	0.98070.94310.9070
2	Transmission assay constant speed	735511A	103	100300500	1.60 · 10^–24.79 · 10^–27.98 · 10^–2	0.98420.9533x0.9233
3	EFIS Control panel	622-8001-350	70	100300500	1.08 · 10^–23.25 · 10^–25.42 · 10^–2	0.98920.96800.9472
4	Standby horizon indicator	H341ANM1	69	100300500	2.14 · 10^–26.41 · 10^–21.07 · 10^–1	0.97890.93790.8987
5	Panel audio select	5145-1-64	61	100300500	6.30 · 10^–31.89 · 10^–23.15 · 10^–2	0.99370.98130.9690
6	VOR/ILS receiver	822-0761-001	61	100300500	9.45 · 10^–32.83 · 10^–24.72 · 10^–2	0.99060.97210.9539
7	GCU	948F458-5	56	100300500	5.78 · 10^–31.73 · 10^–22.89 · 10^–2	0.99420.98280.9715
8	generator	976J498-2	54	100300500	5.58 · 10^–31.67 · 10^–22.79 · 10^–2	0.99440.98340.9725
9	Altimeter	2057-01-1	53	100300500	8.21 · 10^–32.46 · 10^–24.10 · 10^–2	0.99180.97570.9598
10	Transponder	822-1338-003	49	100300500	7.59 · 10^–32.28 · 10^–23.79 · 10^–2	0.99240.97750.9628
11	Symbol generator	622-9436-101	49	100300500	7.59 · 10^–32.28 · 10^–23.79 · 10^–2	0.99240.97750.9628

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

Article Category: research article

Published Online: Dec 08, 2023

Page range: 71 - 78

Received: Nov 17, 2021

Accepted: Nov 07, 2023

DOI: https://doi.org/10.2478/tar-2023-0024

Keywords
aircraft equipment, aviation technology, probability of failure, components, functional systems

© 2023 Jevgenijs Terescenko et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1.

Figure 2.

Figure 3.

Figure 4.

Figure 5.

Figure 6.

The most frequently removed avionics devices.

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

Article Category: research article

Published Online: Dec 08, 2023

Page range: 71 - 78

Received: Nov 17, 2021

Accepted: Nov 07, 2023

DOI: https://doi.org/10.2478/tar-2023-0024

Keywordsaircraft equipment, aviation technology, probability of failure, components, functional systems

© 2023 Jevgenijs Terescenko et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1.

Figure 2.

Figure 3.

Figure 4.

Figure 5.

Figure 6.

The most frequently removed avionics devices.

Keywords
aircraft equipment, aviation technology, probability of failure, components, functional systems