APRILIANA, NADYA LISA (2026) ANALISIS KEANDALAN KOMPONEN OIL COOLER DAN SISTEM PENDINGINAN APU GTCP 131-9B MENGGUNAKAN DISTRIBUSI WEIBULL. S1 thesis, Universitas Mercu Buana Jakarta.
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Abstract
Oil cooler merupakan komponen penting pada sistem pendinginan oli Auxiliary Power Unit (APU) GTCP 131-9B yang berfungsi menjaga temperatur oli tetap dalam batas operasi yang diizinkan. Kegagalan pada komponen ini dapat menyebabkan high oil temperature shutdown yang berdampak pada penurunan keandalan dan ketersediaan operasional pesawat. Penelitian ini bertujuan untuk menganalisis penyebab kegagalan oil cooler, mengevaluasi penurunan kinerja perpindahan panas, serta menentukan karakteristik keandalan komponen berdasarkan analisis distribusi Weibull. Metode penelitian meliputi inspeksi visual kondisi fisik oil cooler, perhitungan performa perpindahan panas menggunakan perpindahan panas, serta analisis keandalan berbasis data time since installation (TSI) dari 37 unit oil cooler. Hasil analisis menunjukkan bahwa kegagalan dominan oil cooler disebabkan oleh kontaminasi dan degradasi fin yang menurunkan kemampuan pelepasan panas secara progresif. Perhitungan perpindahan panas menunjukkan penurunan performa pendinginan hingga sekitar 88,7% pada kondisi kotor dibandingkan kondisi normal. Analisis Weibull menghasilkan nilai shape parameter β = 3,0874 yang mengindikasikan kegagalan berada pada fase wear-out failure dan bersifat age-dependent, dengan nilai Mean Time To Failure (MTTF) sekitar 12.800 jam. Unit oil cooler dengan jam operasi tinggi menunjukkan tingkat keandalan yang sangat rendah dan risiko kegagalan yang meningkat signifikan. Berdasarkan hasil penelitian, disimpulkan bahwa strategi preventive maintenance dan preventive replacement berbasis jam operasi lebih tepat dibandingkan pendekatan run-to-failure untuk meningkatkan keandalan sistem pendinginan oli APU GTCP 131-9B. The oil cooler is a critical component in the lubrication cooling system of the GTCP 131-9B Auxiliary Power Unit (APU), responsible for maintaining oil temperature within allowable operating limits. Failure of this component may lead to high oil temperature shutdown, which adversely affects aircraft reliability and operational availability. This study aims to analyze the failure causes of the oil cooler, evaluate the degradation of heat transfer performance, and determine its reliability characteristics using Weibull distribution analysis. The research methodology includes visual inspection of oil cooler physical conditions, heat transfer performance evaluation based on energy balance calculations, and reliability analysis using time since installation (TSI) data from 37 failed oil cooler units. The results indicate that the dominant failure mechanism is contamination and fin degradation, which progressively reduce heat dissipation capability. Heat transfer analysis shows a cooling performance reduction of approximately 88.7% under dirty conditions compared to the clean condition. Weibull reliability analysis yields a shape parameter β of 3.0874, indicating a wear-out failure pattern and agedependent behavior, with a Mean Time To Failure (MTTF) of approximately 12,800 hours. Oil cooler units operating beyond this range exhibit significantly reduced reliability and increased failure risk. Based on these findings, age-based preventive maintenance and preventive replacement strategies are more appropriate than runto-failure approaches to improve the reliability of the GTCP 131-9B APU oil cooling system.
| Item Type: | Thesis (S1) |
|---|---|
| NIM/NIDN Creators: | 41324110046 |
| Uncontrolled Keywords: | Oil cooler, APU GTCP 131-9B, heat transfer, Reliability, Weibull Distribution. |
| Subjects: | 600 Technology/Teknologi > 620 Engineering and Applied Operations/Ilmu Teknik dan operasi Terapan > 621 Applied Physics/Fisika terapan > 621.5 Pneumatic, Vacuum, Low-Temperature Technologies/Pneumatik, Vakum, Teknologi Suhu Rendah 600 Technology/Teknologi > 620 Engineering and Applied Operations/Ilmu Teknik dan operasi Terapan > 629 Other Branches of Engineering/Cabang Teknik Lainnya > 629.1 Aerospace Engineering/Teknik Penerbangan |
| Divisions: | Fakultas Teknik > Teknik Mesin |
| Depositing User: | Haqi ar rachma nur |
| Date Deposited: | 02 Apr 2026 04:00 |
| Last Modified: | 02 Apr 2026 04:00 |
| URI: | http://repository.mercubuana.ac.id/id/eprint/101426 |
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