• 항공우주의학회지
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• 제30권2호
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• pp.61-65
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• 2020

In the case of aviation maintenance work, several kinds of shift works are performed during day and night, and a lot of works are performed on the ramp due to the characteristics of the aircraft flight schedule. Maintenance workers are often exposed to the sun or in cold temperatures for aircraft maintenance works. The fatigue risk of the maintenance workers will be weighted. In particular, the work at night shift under normal biological rhythms can make maintenance workers feel sleepy during daytime work. It can also affect the safety of aircraft and individual workers. Accordingly, this study will consider fatigue-related previous researches in the field of aviation maintenance, review the effects of shift work, and how fatigue affects aviation mechanics during the day/night shifts. Considering these factors, we tried to present a plan that can minimize the fatigue of aviation workers through this study.

• Advances in aircraft and spacecraft science
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• 제2권4호
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• pp.391-401
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• 2015

Crashworthiness design and certification have been and will continue to be the main concern in aviation safety. The effects of roll angles on fuselage section crashworthiness for typical civil transport category aircrafts were investigated. A fuselage section with waved-plates under cargo floor is suggested, and the finite element model of fuselage section is developed to simulate drop test subjected to 7 m/s impact velocity under conditions of 0-deg, 5-deg, 10-deg and 15-deg roll angles, respectively. A comparative analysis of failure modes, acceleration responses, and energy absorption of fuselage section under various conditions are given. The results show that the change of roll angles will significantly affect fuselage deformation, seat peak overloads, and energy absorption. The crashworthiness capability of aircraft can be effectively improved by choosing appropriate landing way.

• 한국지능시스템학회논문지
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• 제25권6호
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• pp.607-614
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• 2015

본 논문은 항공기 정비사의 핵심역량 16개에 대하여 정비능력향상을 목적으로 FSM을 이용하여 구조분석을 실시하여 최상층 3개, 중간층 3개, 하위층 10개로 분류되는 계층별 구조를 핵심역량간의 연결상태와 중요도를 파악하였다. 또한 항공기 정비사의 핵심역량은 업무를 통해서 정비품질 및 생산성이 향상될 수 있다는 관점에서 핵심역량과 업무를 퍼지관계를 이용하여 100명의 항공기 정비사의 설문을 통하여 퍼지관계행렬을 구하여 업무를 평가하는 기준으로 사용하고자 하였다. 본 논문에서는 모델링데이터 100개와 체킹데이터 67개를 사용하여 모델의 유효성을 보였다.

• 경영과학
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• 제13권3호
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• pp.163-172
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• 1996

According to flying hours, aircraft engines require regular overhaul for preventive maintenance. Because of hostile defense environment of Republic of Korea, the aircraft of republic of Korea Air Force(ROKAF) have been operated at the maximum level of availability and have similar overhaul schedule in several months. The concentration of overhaul schedule in a short period demands additional spare engines far exceeding the spare engines for corrective maintenance. If ROKAF decides to purchase extra engines for the preventive maintenance, the extra engines will be used only for the preventive maintenance and will be excess inventory for the most of aircraft life ccle. Also, the procurement of extra engines is significant investment for ROKAF. To help ROKAF schedule the preventive maintenance without significant spending, this study develops a dynamic programming model that is solvable using an integer programming algorithm. The model provides the number of engines that should be overhauled for a month for multiple periods under given constraints. ROKAF actually used this model to solve a T-59 engine overhaul problem and saved about three billion won at one time. ROKAF plans to use this model continuously for T-59 and other weapon systems. Thus, saving for long term will be significant to ROKAF. Finally, with minor modification, this model can be applied to deciding the minimum number of spare engines for preventive maintenance.

• 항공우주정책ㆍ법학회지
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• 제33권1호
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• pp.175-204
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• 2018

최근 항공레저사업이 법제화되고 관련된 산업이 제도권 내에서 활성화 기반을 갖추어 경량항공기의 도입과 운영이 늘어나고 있다. 2014년 개정된 항공법에서는 항공레저스포스사업이 영리행위를 위해 사업등록을 의무화하여 법적 제도권하에서 항공기체와 항공사업을 관리할 수 있도록 하였다. 그러나 경량항공기 안전문제에 있어서는 규정을 위반하여 비행하거나, 운영자의 안전의식 부족 및 능력 부족 등이 자주 언급되고 있으며, 개인 운영자들의 경우, 안전관리 미흡과 정비 불량 등 경량항공기의 사고위험이 상존하고 있다. 현재 우리나라에서는 경량항공기 정비는 관련 법규에 따라 항공정비사가 담당하고 있으나 자격과 전문성을 갖추었다고 보기는 어렵다. 항공정비사 제도상에 경량항공기 정비 업무를 담당하는 것이 법적인 문제가 되는 것은 아니다. 다만, 항공기, 경량항공기, 초경량비행장치를 구분하고 정비업무에서 포괄적으로 담당하도록 하고 있어 신뢰성과 적정성의 문제는 지속적으로 제기되고 있다. 즉, 경량항공기에 대한 법적, 제도적 체계를 분리하고 있음에도 많은 부분을 항공기 법조항에 준용규정 하고 있으며, 경량항공기 정비업무 역시 현 항공기 정비체계를 따르고 있는 것이다. 일반항공(General Aviation)이 발달한 미국, 유럽, 호주 등에서는 경량항공기 정비와 관련한 법적 제도적인 장치가 도입되었고, 전문적인 정비업무를 경량항공기 정비사 제도권에서 다루고 있다. 국내외 법령의 분석 결과 경량항공기 정비자격제도에 대한 도입이 필요하다. 미국, 유럽, 호주 등 일반항공 선진국에서는 경량항공기 정비사 제도를 두고 안전관리를 수행하고 있다. 이는 새로운 경량항공기 운영 환경 변화에 대처하기 위한 것이다. 본 연구에서는 단순히 경량항공기 정비사 제도에 대한 필요성만을 제시한 것은 아니다. 법적 체계의 관점에서도 제도의 보완이 필요한 부분인 것은 관련 법령의 검토 결과 나타났다. 해외 사례와의 비교에서도 도입의 필요성이 제기되는 것도 사실이다. 이러한 결과를 바탕으로 경량항공기 정비사 제도에 도입의 필요성은 있으며, 어떠한 방법으로 개선해 가는 것이 적절한지에 대한 방안을 제시해 보았다.

• 항공우주의학회지
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• 제30권3호
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• pp.91-94
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• 2020

The coronavirus infectious disease-19 (COVID-19) pandemic has had a profound impact on the aviation industry. In order to overcome this crisis, airlines have made their efforts in various fields. Therefore, we tried to summarize these efforts of airlines. It is also essential to keep aircraft that have been in landing for a long time in optimal condition. In this paper, we tried to find out about efforts to maintain landing aircraft and maintenance of personnel. Through such constant care, airlines will be able to quickly respond to increasing aviation demand when the infectious disease situation is stabilized in the future. Finally, airlines and passengers must make several efforts to ensure that passengers are free from COVID-19 while traveling by air. These include general precautions to prevent infection, separation of airline personnel and passengers, changes in seat assignments and in-flight services, periodic aircraft disinfection, and prevention of in-flight infections.

• 산업경영시스템학회지
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• 제46권2호
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• pp.47-56
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• 2023

This study identified the core competencies of aircraft maintenance quality engineers and compared the importance and retention of core competencies. Through literature research, 21 core competencies were derived in three areas of management technology, elemenal technology and collaboration technology, and a survey was conducted on the importance and retention of core competencies for 42 aircraft maintenance quality engineers. As a result of the survey, the importance of all core competencies of aircraft maintenance quality engineers is 3.95/5 on average, and the retention of all core competencies is 3.99/5 on average. 'Risk Management', 'Creating Document', 'Honesty/Moral' were identified as the most important competencies in each area, and 'Quality Management', 'Language', 'Honesty/Moral' were identified as the most possessed competencies in each area. An IPA (Importance-Performance Analysis) was performed to analyze the details. Through IPA, 'Risk Management' and 'Safety Management' were evaluated as having a low degree of retention compared to a high level of importance. Therefore, they were identified as a core competencies that need to be improved first. In addition, the characteristics of each core competency and the recognition level in the field were also identified. This study will be helpful in defining the roles and functions of aircraft maintenance quality engineers to improve flight quality and prevent aviation accidents.

• 한국항공운항학회지
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• 제28권3호
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• pp.12-17
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• 2020

Avionics is a compound word of aviation and electronics that began to be used in the late 1930s. In the components or sub-systems installed to the aircraft, avionics is something that works by electronic technology. In the past, the aircraft mate, the flight engineer, and the radar operators performed the work on board the aircraft but the modern aircraft have replaced these tasks with avionics. the aircraft mechanics who maintain and manage such complex aircraft must have expertise and technics with the development of avionics to maintain aircraft airworthiness. This paper is about the introduction of domestic avionics qualification system and the development of avionics maintenance technology. For this, the SWOT analysis is performed by identifying the internal and external environment. And recommend the strategy and direction of domestic avionics qualification and education system.

• 대한안전경영과학회지
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• 제13권1호
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• pp.183-188
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• 2011

Management of maintenance parts in the aircraft have difficulty because of high cost of part, necessity of separate managements, and very many kinds of parts. The serial number of parts was used in maintenance process and then the results was depended on worker's ability. Also the workers used printed work order and manual at every time in maintenance processes. In this study, we analyzed the maintenance process and the information that occurs in the material warehouse and hangar for large airline company to solve the problems about inventory and visualization. Based on above analysis we developed the maintenance process with integrated by information technologies such as QR code and tablet PC. We expect the reduced errors resulting from visually checking and decreased work hours and maintenance cost and will finally develop the smart work.

• 한국국방경영분석학회지
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• 제30권2호
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• pp.96-107
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• 2004

This paper deals with $\ulcorner$Requirement Decision Model for Repair Parts supplied by the Government$\lrcorner$ which is to reduce Aircraft Contract Maintenance Cost. It aims to find solutions to the fundamental problems of the Aircraft Contract Maintenance System. Under the current Aircraft Contract Maintenance System, it is hard to forecast the exact demand of repair parts, so support rate of Repair Parts supplied by the Government is restricted under 50 percent. It is inevitable to purchase Repair Parts from the firm with much higher price than those of Government source. However, absence of fixed demand pattern makes it difficult to improve accuracy of demand forecast. As a solution to these problems, this model prevents a cost increase due to the unit price difference between Repair Parts supplied by the Government and Repair Parts purchased by the Firm. It also reflects demand characteristics of each repair part, and prevents continual stock increase by setting an upper limit on the amount of Repair Parts supplied by the Government. The effectiveness of this model is verified by empirical analysis using the latest raw data. By applying this model to real situation, we expect to reduce about 4 billion won every year.