HANTASUMA, HANTASUMA (2026) ANALISIS KEGAGALAN AIR TURBINE STARTER PADA PESAWAT BOEING 737 NEXT GENERATION DENGAN METODE FAILURE MODE AND EFFECTS ANALYSIS (FMEA). S1 thesis, Universitas Mercu Buana Jakarta.
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Abstract
The Air Turbine Starter (ATS) is a critical component in the engine starting system of the Boeing 737 Next Generation, functioning to generate the initial rotational speed required for engine start. Based on a Pareto analysis of maintenance order reports, ATS failures are predominantly concentrated in three major categories contamination/dirt, bearing failure, and damaged or missing parts which cumulatively account for approximately 70% of total failure cases, indicating that most failures are associated with contamination mechanisms and rotating component degradation. This study aims to identify ATS failure modes caused by contamination, analyze their impact on bearing performance, and evaluate their implications for shop visit intervals. The research methods include order report data analysis, failure classification using Pareto diagrams, Failure Mode and Effect Analysis (FMEA), and bearing life simulation based on the ISO 281 standard. Further Pareto analysis within the contamination category shows that three dominant failure modes bearing damage, reduced turbine wheel performance due to blade contamination, and restricted airflow at the inlet screen collectively contribute to approximately 70% of contamination-related failures. These conditions cause rotor imbalance and increased vibration, leading to higher equivalent loads acting on the bearing. Test data indicate an increase in rotational time of 8.9% due to contamination, assumed to be proportional to the increase in effective bearing load, resulting in a reduction of theoretical bearing life by approximately 23% compared to normal conditions. This study highlights the importance of contamination control and routine cleaning in accordance with the Aircraft Maintenance Manual (AMM) to improve ATS reliability and serviceability during shop visits Keywords: Air Turbine Starter, Bearing, FMEA, Boeing 737 NG, Failure Air Turbine Starter (ATS) merupakan komponen penting pada sistem start mesin pesawat Boeing 737 Next Generation yang berfungsi menghasilkan putaran awal untuk proses starting engine. Berdasarkan hasil analisis Pareto terhadap laporan perbaikan (order report), kegagalan ATS didominasi oleh tiga kategori utama, yaitu kotoran/kontaminasi, bearing rusak, dan part rusak/missing part, yang secara kumulatif menyumbang sekitar 70% dari total kasus kegagalan, sehingga menunjukkan bahwa sebagian besar kegagalan berkaitan dengan mekanisme kontaminasi dan degradasi komponen berputar. Penelitian ini bertujuan untuk mengidentifikasi mode kegagalan ATS akibat kontaminasi, menganalisis pengaruhnya terhadap bearing, serta mengevaluasi implikasinya terhadap interval shop visit. Metode yang digunakan meliputi analisis data order report, klasifikasi kegagalan menggunakan diagram Pareto, analisis Failure Mode and Effect Analysis (FMEA), serta simulasi perhitungan umur bearing berdasarkan standar ISO 281. Hasil analisis Pareto lanjutan pada kategori kontaminasi menunjukkan bahwa tiga mode kegagalan dominan, yaitu kerusakan bearing, penurunan performa turbine wheel akibat penumpukan debu, dan terhambatnya aliran udara pada inlet screen, secara kumulatif juga menyumbang sekitar 70% dari kegagalan terkait kontaminasi. Kondisi ini menyebabkan ketidakseimbangan rotor dan peningkatan vibrasi yang meningkatkan beban ekuivalen bearing. Data pengujian menunjukkan kenaikan waktu putar sebesar 8,9% akibat kontaminasi yang diasumsikan berbanding lurus dengan peningkatan beban efektif, sehingga menurunkan umur teoritis bearing hingga sekitar 23% dibandingkan kondisi normal. Penelitian ini menegaskan pentingnya pengendalian kontaminasi dan pembersihan rutin sesuai Aircraft Maintenance Manual (AMM) untuk meningkatkan keandalan dan serviceability ATS. Kata kunci: Air Turbine Starter, Bearing, FMEA, Boeing 737 NG, Kegagalan
| Item Type: | Thesis (S1) |
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| NIM/NIDN Creators: | 41324110013 |
| Uncontrolled Keywords: | Air Turbine Starter, Bearing, FMEA, Boeing 737 NG, Kegagalan |
| Subjects: | 600 Technology/Teknologi > 620 Engineering and Applied Operations/Ilmu Teknik dan operasi Terapan > 621 Applied Physics/Fisika terapan > 621.8 Machine Engineering, Machinery/Teknik Mesin 600 Technology/Teknologi > 650 Management, Public Relations, Business and Auxiliary Service/Manajemen, Hubungan Masyarakat, Bisnis dan Ilmu yang Berkaitan > 653 Shorthand/Penulisan Cepat, Penulisan dengan Tangan > 653.3 Machine Systems/Sistem Mesin 700 Arts/Seni, Seni Rupa, Kesenian > 720 Architecture/Arsitektur > 729 Design and decoration of Structures/Desain dan Pola Bangunan > 729.1 Design in Vertical Plane/Desain Pesawat Vertikal |
| Divisions: | Fakultas Teknik > Teknik Mesin |
| Depositing User: | khalimah |
| Date Deposited: | 27 Feb 2026 07:27 |
| Last Modified: | 27 Feb 2026 07:27 |
| URI: | http://repository.mercubuana.ac.id/id/eprint/101234 |
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