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All Journal Jurnal Elemen Conference SENATIK STT Adisutjipto Yogyakarta Angkasa: Jurnal Ilmiah Bidang Teknologi Compiler KACANEGARA Jurnal Pengabdian pada Masyarakat Jurnal Penamas Adi Buana Abdimas Galuh: Jurnal Pengabdian Kepada Masyarakat Reswara: Jurnal Pengabdian Kepada Masyarakat Southeast Asian Mathematics Education Journal Jurnal Anugerah: Jurnal Pengabdian Kepada Masyarakat Bidang Keguruan dan Ilmu Pendidikan Vortex Jurnal Pengabdian Masyarakat Intimas (Jurnal INTIMAS): Inovasi Teknologi Informasi Dan Komputer Untuk Masyarakat Jurnal Peradaban Masyarakat (JPM) Journal of International Conference Proceedings Jurnal Manajemen dan Teknologi Rekayasa Joong-Ki Joong-Ki
Rahmawati, Fajar Khanif
Institut Teknologi Dirgantara Adisutjipto
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Nursing Public Health Social Sciences Other

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Failure probability of F-100 Pratt & Whitney-220E turbofan engine on F-16 fighting falcon aircraft Hanawa, Riski Riswandi; Rahmawati, Fajar Khanif; Prattiwi, Elisabeth Anna; Deny Kusumaningrum, Maria Asumpta; Kumolosari, Eli
Vortex Vol 5, No 2 (2024)
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/vortex.v5i2.2251

Abstract

Engine failure is a condition where the engine operates outside normal conditions. One of the abnormal conditions that occurs can be caused by a fault that occurs in each engine module. Engine module is one of the components on an aircraft that functions for supports the aircraft to fly and controls all engine operations, wether on the ground and during flight. The problem can occur in each engine module at any time causing engine failure. Therefore, it is necessary to carry out further analysis to determine the cause of the failure that occurred, as well as to implement appropriate mitigation measures. The method used is the Fault Tree Analysis (FTA) method, which is a method for identifying risks that contribute to failure and determining failure probability. From the analysis using the qualitative fault tree analysis method 71 events were obtained with 35 basic events. Meanwhile, the quantitative analysis produces a cumulative probability failure of 0.747. The probability value has almost reached 1, therefore preventive maintenance has to be carried out to prevent functional failure.
GROB G 120 TP-A AIRCRAFT BETA SYSTEM ANALYSIS USING FTA (FAULT TREE ANALYSIS) METHOD Rahmawati, Fajar Khanif; Priyahapsara, Istyawan; Funny, Rindu Alriavindra; Wati, Denisa Trisma
Vortex Vol 4, No 2 (2023)
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/vortex.v4i2.1652

Abstract

Grob G 120 TP - A beta system aircraft is a system that regulates the size of the angle on the propeller. 42 failures occurred in the beta system from August 2016 to May 2021, resulting in the beta system having to be replaced even before reaching its 2500 flight hour age limit. Using the FTA (Fault Tree Analysis) method, which begins with defining the failure and determining the boundary conditions of the beta system, describing the fault tree model, identifying the minimum cut set from the fault tree, performing a qualitative analysis of the faults tree, and doing a quantitative analysis of the fault tree, it can be seen that the failure that often occurs in the beta system of the Grob G 120 TP-A aircraft is the occurrence of high oil temperature over 84 ℃, the qualitative analysis found 12 causes of failure on the beta system, and based on quantitative analysis obtained probability the occurrence of beta system failure is 0.76363.
ANALISIS KEGAGALAN NOSE WHEEL STEERING SYSTEM PADA PESAWAT BOEING DENGAN MENGGUNAKAN METODE FAILURE MODE AND EFFECT ANALISYS Anggawaty, Dwi; Mulyani, Sri; Rahmawati, Fajar Khanif
Vortex Vol 3, No 1 (2022)
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (493.292 KB) | DOI: 10.28989/vortex.v3i1.1179

Abstract

Aircfrat use nose wheel steering system when landing, take off and landing. In the research discuses the problem of nose wheel steering system B737 – 800 to minimize problems ini nose wheel steering system. The stage of this research are to study the work system of nose wheel steering. Then look for the cause of the problem using the FMEA analysis method. This research is based on data from AFML (aircraft Flight and Manual Log) of the B737 – 800 Aircraft from January 2020 to Junu 2021 at Lion Airline. The results showed that the problem of nose wheel steering system in the failure mode analysis process using FMEA method data in the highest RPN ( Risk priority Number) value is 175 with the case steering collar dan torQ link need lubrication and case Tire pressure that caused by the lack of lubrication on the component and different pressure in tire. Then it is necessary to do inspection before flight.
Analisis penambahan Unit Aviobridge untuk meningkatkan efisiensi dan efektifitas apron di Bandar Udara Internasional Yogyakarta Pramiswari, Faradiba Ghandi; Gunawan, Gunawan; Rahmawati, Fajar Khanif
Vortex Vol 5, No 1 (2024)
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/vortex.v5i1.2037

Abstract

Bandara Internasional Yogyakarta berada di Kabupaten Kulon Progo, Daerah Istimewa Yogyakarta, Indonesia. Aviobridge merupakan jembatan antara pesawat dengan terminal bandara yang memudahkan pergerakan penumpang dan awak kabin, bertujuan untuk meningkatkan kenyamanan penumpang dan memudahkan aktivitas operasional petugas. Karena tingginya permintaan penggunaan aviobridge oleh personel ground handling, petugas pengendali pergerakan apron menghadapi tantangan, terutama pada jam sibuk. Oleh karena itu, perlu dilakukan penambahan unit aviobridge. Penambahan unit aviobridge ini juga sebagai upaya meningkatkan efisiensi dan efektivitas area apron. Metodologi yang digunakan adalah metode peramalan regresi linier. Berdasarkan hasil peramalan kedatangan pesawat, jumlah kedatangan pesawat selama periode 2023-2032 diperkirakan mengalami peningkatan sebagai berikut: 12814, 15543, 18271, 21000, 23729, 26458, 29186, 31915, 34644 dan 37372. Selain itu, pada jam sibuk, jumlah kedatangan pesawat berkisar antara 8 hingga 14. Penggunaan aviobridge dapat meningkatkan efisiensi ground time pesawat dari 0% menjadi 30% dan meningkatkan efektivitas penggunaan parking stand dari 100% menjadi 142%. Dengan analisis keuangan menunjukkan uang masuk sebesar Rp. 1.131.101.055 per tahun dan cash out sebesar Rp. 159.218.070 per tahun, estimasi payback period pengadaan aviobridge adalah 6,8 tahun, dengan internal rate of return sebesar 13,79%.
CASE ANALYSIS ON FLIGHT CONTROL SYSTEM SIKORSKY S76 C++ FAILURE FROM YAW CONTROL ASPECT Rahmawati, Fajar Khanif; Lukito, Indro; Baihaqi, M Imam
Vortex Vol 3, No 1 (2022)
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (495.451 KB) | DOI: 10.28989/vortex.v3i1.1155

Abstract

Flight Control is a system that functions as a helicopter control center. Failure that occurs in flight control would certainly result inconvenience of the pilot in operating the helicopter, even the movement of the helicopter can out of control causing incident or accident. The continuity of the helicopter operation is affected by the maintenance system applied. One of mode moving system helicopter is yaw control, that could control the nose helicopter to move right and left. Fault Tree Diagram could described  analytical technique, whereby an undesired state of the system is specified (usually a state that is critical from a safety or reliability standpoint). The system then analyzed in the context of its environment and operation to find the solution. Based on the analysis results of failures that occurred in the Sikorsky S76 C ++ helicopter flight control from yaw control aspect in the period of January 2015 to May 2018 with an average use of helicopter’s 2092.05 flight hours, there were 46 failures which caused by yaw control. Based on diagram, there were 4 basic events which caused unschedule maintenance on Sikorsky S76 C ++ helicopter flight control system because of yaw fail control,  so that a replacement or repair was needed for the components that affected to the system failure.
Mapping cognitive load profiles in realistic mathematics education: A study with aerospace engineering students Funny, Rindu Alriavindra; Rahmawati, Fajar Khanif
Jurnal Elemen Vol 11 No 4 (2025): October
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/jel.v11i4.32104

Abstract

Although Realistic Mathematics Education (RME) promotes deeper conceptual learning, empirical evidence mapping different types of cognitive loads in university engineering mathematics is limited. This mixed-methods study profiled intrinsic, extraneous, and germane cognitive loads among 76 first-year aeronautical engineering students working on RME-based task, a contextualized double integral problems modelling aircraft wing surface. We measured load components with a CLT questionnaire that adapted from Leppink et.al and mental effort with the Paas scale, then triangulated findings with student reflections and observations. Correlations showed intrinsic and germane load related to students’ mental effort, while extraneous load was minimal, suggesting clear task design. Multiple regression analysis clarified that the germane load was the main unique predictor of mental effort, whereas intrinsic complexity and extraneous factors contributed little uniquely. Qualitative data confirmed that students used strategies such as breaking tasks into sub-steps, activating prior knowledge, and peer explanation to manage effort. We propose an RME–CLT alignment framework that scaffolds intrinsic difficulty, minimizes extraneous processing, and cultivates germane engagement through reflective context-rich tasks. The findings also inform the design of cognitively efficient engineering-mathematics curricula. Thus, it offers practical guidance for designing cognitively efficient engineering mathematics instruction and recommends future studies using longitudinal and real-time measures.
Co-Authors Anggawaty, Dwi Anisafitri, Berni Arfandi Achmad Arwin Datumaya Wahyudi Sumari Baihaqi, M Imam Bambang Sudibya, Bambang Benedictus Mardwianta, Benedictus Budiono, Cyrilus Sukaca Denny Dermawan Deny Kusumaningrum, Maria Asumpta Dwi Hartini Eko Poerwanto Eli Kumolosari Esa Rengganis Sulliyartha Faturrahman, Mochamad Fikri Freddy Kurniawan Gayatri, Tasya Gunawan Gunawan Gunawan Gunawan Hanawa, Riski Riswandi Humaid Iswahyu Hafizh Rakha Istyawan Priyahapsara Kris Hariyanto Lasmadi, Lasmadi Leanny, Shania Intan Lukito, Indro Maria Asumpta deny Kusumaningrum Maria Asumpta Deny Kusumaningrum, Maria Asumpta Deny Muhammad Abdul Ghofur Nurdin, Riani Perkasa, Syahmi Prakoso, Suyudi Imam Pramiswari, Faradiba Ghandi Prattiwi, Elisabeth Anna Priyahapsara, Istyawan Priyahapsara Putra, Ananda Adhitya Rakahila, Raihan Aventa Rastra Arif Pradana Rindu Alriavindra Funny Rindu Alriavindrafunny Rully Medianto, Rully Santoso, Djarot Wahyu Setiawan, Paulus Sri Mulyani Sri Mulyani Sukmabuana, Nengah Batara Uyuunul Mauidzoh Wati, Denisa Trisma Wibowo, Suryo Ari Yenni Astuti, Yenni Zalukhu, Wellman