Analisis Kebocoran Seal Pada Door Hydraulic Actuator Main Landing Gear Pesawat Airbus A330-300 PK-GPW Menggunakan Metode Fault Tree Analysis

Akbar, Erica Vira Tamaica (2026) Analisis Kebocoran Seal Pada Door Hydraulic Actuator Main Landing Gear Pesawat Airbus A330-300 PK-GPW Menggunakan Metode Fault Tree Analysis. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Door Actuator Main Landing Gear merupakan komponen vital sistem hidrolik pesawat yang berfungsi mengonversi energi mekanik dari mesin menjadi energi hidrolik untuk mendukung sistem kendali terbang, roda pendaratan, dan rem. Kompleksitas operasionalnya menjadikan seal door actuator main landing gear rentan mengalami kebocoran yang berpotensi mengganggu operasi hingga mengancam keselamatan penerbangan. Penelitian ini menganalisis kebocoran seal rod yaitu bagian O-Ring yang terdapat pada piston door actuator dengan pendekatan Fault Tree Analysis (FTA). Hasil analisis kualitatif menunjukkan terdapat 12 Minimal Cut Sets (MCS), seluruhnya merupakan single point failures. Penyebab kegagalan meliputi keausan komponen mekanik, kontaminasi fluida, kerusakan mekanik, masalah perakitan, overheating, dan gangguan elektrik. Probabilitas Top Event dihitung sebesar 1,39 × 10⁻⁴, tergolong Remote menurut FAA AC 25.1309. Meskipun masih dalam batas yang dapat diterima untuk kondisi non-catastrophic, nilai ini mengindikasikan adanya risiko yang perlu dimitigasi. Rekomendasi mitigasi meliputi preventive maintenance sebelum mencapai MTBF ±1000 jam terbang, pemeriksaan kualitas fluida hidrolik, kalibrasi rutin komponen elektrik, pemeriksaan perakitan sesuai standar OEM, dan inspeksi berkala wiring. Penelitian ini diharapkan berkontribusi pada peningkatan keandalan serta keselamatan sistem hidrolik pesawat.
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Door Actuator Main Landing Gear is a vital component of the aircraft's hydraulic system that functions to convert hydraulic energy into mechanical motion to actuate landing gear doors and related components support the flight control system, landing gear, and brakes. Its operational complexity makes the seal of the door actuator main landing gear susceptible to leakage, which can potentially disrupt operations and threaten flight safety. This research analyzes the leakage of the seal rod, which is the O-Ring part found on the door actuator piston, using a Fault Tree Analysis (FTA) approach. The results of the qualitative analysis show that there are 12 Minimal Cut Sets (MCS), consisting of 9 single point failures and 3 double failures. The causes of failure include wear of mechanical components, fluid contamination, mechanical damage, assembly issues, overheating, and electrical disturbances. The probability of the Top Event is calculated to be 1.39 × 10⁻⁴, categorized as Remote according to FAA AC 25.1309-1A. Although still within acceptable limits for non catastrophic, this value indicates the presence of risks that need to be mitigated. Mitigation recommendations include preventive maintenance before reaching a MTBF of ±1000 flight hours, inspection of hydraulic fluid quality, routine calibration of electrical components, assembly inspection according to OEM standards, and periodic wiring inspections. This research is expected to contribute to the improvement of the reliability and safety of aircraft hydraulic systems.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Door Actuator, Fault Tree Analysis, Landing Gear, Sistem Hidrolik. , Door Actuator, Fault Tree Analysis, Landing Gear, Hydraulic System.
Subjects:	T Technology > TJ Mechanical engineering and machinery T Technology > TJ Mechanical engineering and machinery > TJ935 Pipe--Fluid dynamics. Tubes--Fluid dynamics
Divisions:	Faculty of Vocational > Mechanical Industrial Engineering (D4)
Depositing User:	Erica Vira Tamaica Akbar
Date Deposited:	03 Feb 2026 07:25
Last Modified:	03 Feb 2026 07:25
URI:	http://repository.its.ac.id/id/eprint/131784

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