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3. APU STARTER MOTOR RELIABILITY ANALYSIS P/N 2704506 – 4 AIRBUS A320S USING WEIBULL DISTRIBUTION AND FAILURE MODE AND EFFECT ANALYSIS AT PT INDONESIA AIRASIA Yogi Prisma; Caesar Pradewa; Feti Fatonah; Djoko Herwanto; Desiana Putri; Muchammad Furqon; Suroso; Dikasitama
Jurnal TNI Angkatan Udara Vol 5 No 1 (2026): Jurnal TNI Angkatan Udara Triwulan Pertama
Publisher : Staf Komunikasi dan Elektronika, TNI Angkatan Udara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62828/jpb.v5i1.190

Abstract

This study aims to determine the reliability value and failure characteristics ofthe APU starter motor P/N 2704506-4, as well as to identify the failure mode qualitatively toprovide improvement recommendations for PT Indonesia AirAsia. The starter motor in theauxiliary power unit (APU) is a vital component that functions to start the operating cycle.The method used is a mixed method, with quantitative analysis through processing historicaltime to failure data from 20 unscheduled removal cases using the Weibull distribution, andqualitative analysis through failure mode and effect analysis. Data were obtained from theAircraft Maintenance Manual, Component Maintenance Manual, and semi-structuredinterviews with engineers. The analysis results show a value of β = 2.029 (β>1) whichindicates a wear-out failure pattern. The scale parameter η recorded 3,095.71 flight hourswith a mean time to failure of 2,742.85 hours. Reliability projections show that at 2,800 hours,reliability drops to 44.23% with a failure probability of 55.77%. The FMEA analysis identifiedthree failure modes: brush wear, terminal winding burn, and oil contamination. Of these,brush wear was the dominant failure mode, with 12 cases and the highest RPN value (252).The study concluded that starter motor failure is predictive and dominated by brush wear.The primary recommendation is to transition to a preventive maintenance strategy throughvisual inspection of brush wear indicators and scheduled replacement at 2,500–2,600 flighthours to reduce unscheduled removals and increase aircraft availability.
2. ANALYSIS OF ENGINE PYLON STRUCTURAL FAILURE AND ITS IMPACT ON FLIGHT SAFETY:CASE STUDY OF MD-11F (N259UP) Muchammad furqon M; Ahmad Ilham Kamal; Ferdy Sastria; Feti Fatonah; Djoko Herwanto; Desiana Putri; Dikasitama
Jurnal TNI Angkatan Udara Vol 5 No 2 (2026): Jurnal TNI Angkatan Udara Triwulan Kedua
Publisher : Staf Komunikasi dan Elektronika, TNI Angkatan Udara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62828/jpb.v5i2.208

Abstract

This study aims to analyze the catastrophic structural failure experienced bya UPS McDonnell Douglas MD-11F (N259UP) cargo aircraft on November 4, 2025, inLouisville, Kentucky. The investigation focused on the detachment of the number 1 enginedue to engine pylon failure during takeoff. Through metallurgical analysis and a review ofthe NTSB investigation report, fatigue cracking in the forward mount fitting was found to bethe primary cause of the engine detachment. The results revealed gaps in routineinspection methods for aging aircraft. The study concluded that transitioning to StructuralHealth Monitoring technology and fleet modernization are crucial risk mitigation measuresfor the global air cargo industry.
3. AIRPORT EMERGENCY DIESEL PREVENTIVE MAINTENANCE MANAGEMENT USING BATTERY INTERNAL RESISTANCE MONITORING ANALYSIS Ahmad Ilham Kamal; Muchammad Furqon Muchaddats; Feti Fatonah; Djoko Herwanto; Desiana Putri; Sudibyo; Dikasitama
Jurnal TNI Angkatan Udara Vol 5 No 2 (2026): Jurnal TNI Angkatan Udara Triwulan Kedua
Publisher : Staf Komunikasi dan Elektronika, TNI Angkatan Udara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62828/jpb.v5i2.209

Abstract

Emergency diesel generator is a very important system in every industry includingthe airport industry because this system supports the electricity of important equipment whena blackout occurs. in the emergency diesel generator system, there is a battery as a starter forthe diesel engine. if the battery capacity decreases, the diesel generator will not be able tostart the engine, therefore in the emergency diesel generator system, regular batterymaintenance is needed to maintain system reliability. in this journal, preventive maintenanceon the battery will be explained, especially on the emergency diesel generator system battery.one indicator of decreased capacity in the battery is an increase in its internal resistance value.in preventive battery maintenance, analyzing the increase in internal resistance can be areference for replacing a new battery.
4. ECONOMIC ASYMMETRY IN DRONE WARFARE A CASE STUDY OF IRAN'S SHAHED-136 OPERATION AGAINST ISRAEL'S IRON DOME DEFENSE SYSTEM Ahmad Ilham Kamal; Muchammad Furqon Muchaddats; Ferdy Anggrian; Andromeda Yoga Pratama; Riza Suseno; Kurniawan; Dikasitama
Jurnal TNI Angkatan Udara Vol 5 No 2 (2026): Jurnal TNI Angkatan Udara Triwulan Kedua
Publisher : Staf Komunikasi dan Elektronika, TNI Angkatan Udara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62828/jpb.v5i2.210

Abstract

The advent of low-cost loitering munitions has revolutionized modern warfare,creating a profound economic imbalance between offensive and defensive capabilities. In theMiddle East, the deployment of Iran's Shahed-136 drone against Israel's Iron Dome defensesystem serves as a prime example of a "cost-imposing" strategy in asymmetric warfare.Objective: This study aims to quantify the economic disproportion between the production anddeployment costs of the Shahed-136 drone and the operational costs of the Iron Domesystem. It explores how this cost ratio impacts long-term national defense budgets andstrategic sustainability. Methodology: This study uses a qualitative-descriptive approachsupported by comparative economic modelling. Data are synthesized from defense budgetreports, estimates of the Shahed-136 manufacturing costs, and the unit cost of the Iron DomeTamir interceptor missile. The analysis uses the Cost-Exchange Ratio (CER) to evaluate theeconomic efficiency of both sides. Results: The study's findings reveal a sharp economicasymmetry, with a single Shahed-136 estimated to cost between $20,000 and $50,000,depending on configuration, while a single Tamir interceptor missile costs approximately$40,000 to $100,000, depending on configuration. When factoring in "saturation attacks" (ordrone swarms), defense costs increase exponentially, not only through missile expenditurebut also through the economic disruption caused by airstrike warnings and collateralinfrastructure damage if interceptions fail. Conclusion: The study concludes that while IronDome remains tactically effective in saving lives, its current economic trajectory isunsustainable against the threat of low-cost, mass-produced drones. The study suggests thatto maintain strategic stability, the defense framework must transition to lower-cost interceptiontechnologies, such as directed energy weapons (lasers/Iron Beam), to neutralize theeconomic advantage currently held by offensive drone platforms.
Co-Authors Ahmad Ilham Kamal Andromeda Yoga Pratama Caesar Pradewa Desiana Putri Djoko Herwanto Ferdy Anggrian Ferdy Sastria Feti Fatonah Kurniawan Muchammad Furqon Muchammad furqon M Muchammad Furqon Muchaddats Riza Suseno Sudibyo Suroso Yogi Prisma