Claim Missing Document
Check
Articles

Found 3 Documents
Search

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 of the APU starter motor P/N 2704506-4, as well as to identify the failure mode qualitatively to provide improvement recommendations for PT Indonesia AirAsia. The starter motor in the auxiliary 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 historical time to failure data from 20 unscheduled removal cases using the Weibull distribution, and qualitative analysis through failure mode and effect analysis. Data were obtained from the Aircraft Maintenance Manual, Component Maintenance Manual, and semi-structured interviews with engineers. The analysis results show a value of β = 2.029 (β>1) which indicates a wear-out failure pattern. The scale parameter η recorded 3,095.71 flight hours with 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 identified three 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 through visual inspection of brush wear indicators and scheduled replacement at 2,500–2,600 flight hours to reduce unscheduled removals and increase aircraft availability.
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 by a UPS McDonnell Douglas MD-11F (N259UP) cargo aircraft on November 4, 2025, in Louisville, Kentucky. The investigation focused on the detachment of the number 1 engine due to engine pylon failure during takeoff. Through metallurgical analysis and a review of the NTSB investigation report, fatigue cracking in the forward mount fitting was found to be the primary cause of the engine detachment. The results revealed gaps in routine inspection methods for aging aircraft. The study concluded that transitioning to Structural Health Monitoring technology and fleet modernization are crucial risk mitigation measures for the global air cargo industry.
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 the Middle East, the deployment of Iran's Shahed-136 drone against Israel's Iron Dome defense system 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 and deployment costs of the Shahed-136 drone and the operational costs of the Iron Dome system. It explores how this cost ratio impacts long-term national defense budgets andstrategic sustainability. Methodology: This study uses a qualitative-descriptive approach supported by comparative economic modelling. Data are synthesized from defense budget reports, estimates of the Shahed-136 manufacturing costs, and the unit cost of the Iron Dome Tamir interceptor missile. The analysis uses the Cost- xchange Ratio (CER) to evaluate the economic efficiency of both sides. Results: The study's findings reveal a sharp economic asymmetry, 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 expenditure but also through the economic disruption caused by airstrike warnings and collateralinfrastructure damage if interceptions fail. Conclusion: The study concludes that while Iron Dome remains tactically effective in saving lives, its current economic trajectory is unsustainable against the threat of low-cost, mass-produced drones. The study suggests that to maintain strategic stability, the defense framework must transition to lower-cost interception technologies, such as directed energy weapons (lasers/Iron Beam), to neutralize the economic advantage currently held by offensive drone platforms.