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All Journal Bulletin of Community Engagement Jurnal Riset Rumpun Ilmu Teknik (JURRITEK) Asian Journal Science and Engineering Jurnal Ilmiah Teknik Informatika dan Komunikasi Ocean Engineering: Jurnal Ilmu Teknik dan Teknologi Maritim Journal of Engineering Science and Technology Management Jurnal 7 Samudra Politeknik Pelayaran Surabaya
Antonius Edy Kristiyono
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Religion Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Engineering Mechanical Engineering Social Sciences Transportation Other

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Journal : journal of engineering science and technology management

 1 
Analysis of Electrical Voltage Instability Causes in Auxiliary Engine No. 2 Aboard MV. HANGLIMA Bima Nurrahma; Antonius Edy Kristiyono; Agus Prawoto; Shofa Dai Robbi; Sri Mulyanto
Journal of Engineering Science and Technology Management (JES-TM) Vol. 6 No. 2 (2026): June 2026
Publisher : Journal of Engineering Science and Technology Management

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jestm.v6i2.410

Abstract

This study investigates the factors contributing to electrical voltage instability in Auxiliary Engine No. 2 aboard MV. Hanglima. The research was motivated by operational disruptions where the voltage output dropped significantly from the standard 440V to 290V, leading to blackouts when the generator operated independently. Employing a qualitative research method utilizing the Fishbone (Ishikawa) diagram for root cause analysis, data was collected through onboard observation, documentation, and interviews with the engineering crew. The analysis revealed that the instability was primarily caused by mechanical failure in the alternator bearings, which had approached their operational limit, leading to an unbalanced rotor rotation. This mechanical imbalance caused friction between the rotor and stator, resulting in insulation leakage (short circuits) within the windings. Corrective measures implemented included a comprehensive overhaul, re-insulating the rotor and stator windings using insulating varnish, and replacing the worn bearings. These actions successfully restored the voltage output to a stable 445V, ensuring the safety and efficiency of the vessel's electrical system.
Analysis of the Causes of High Internal Temperature in the TMC Type-54EWNA Control Air Compressor on MV Pan Africa Nazha Madeza Bakri; Abdi Seno; Dirhamsyah; Antonius Edy Kristiyono; Teguh Pribadi
Journal of Engineering Science and Technology Management (JES-TM) Vol. 6 No. 2 (2026): June 2026
Publisher : Journal of Engineering Science and Technology Management

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jestm.v6i2.415

Abstract

The control air compressor is one of the important auxiliary machines in the compressed air system on board a ship, which functions to supply air for both manual and automatic pneumatic control systems. One of the problems that frequently occurs in this equipment is an increase in internal temperature (high internal temperature) in the Control Air Compressor TMC Type 54-EWNA, which can reduce compressor performance and increase the risk of damage and operational disturbances. This study aims to analyze the causes of high internal temperature in the control air compressor and to determine appropriate corrective and preventive measures. The methods used in this study include direct observation, interviews, and documentation, as well as analysis using the Fishbone analysis method. The results of the analysis indicate that the main causes of increased internal temperature include suboptimal cooling system performance, deterioration of lubrication quality, inconsistent implementation of the Planned Maintenance System (PMS), as well as the influence of environmental conditions and materials experiencing corrosion. The root cause identified is a lack of supervision and irregularity in maintenance implementation. The recommended efforts to address these problems include optimizing the cooling system, using and replacing oil, filters, and coolers according to specifications, carrying out periodic maintenance in accordance with the PMS and manual book, and improving monitoring of compressor operating parameters. By implementing these measures, it is expected that the compressor’s internal temperature can be controlled, compression pressure remains optimal, and the reliability and safety of the ship’s compressed air system can be maintained.
Analysis Of The Causes Of Suboptimal Steering Gear Performance Based On Maintenance Factors And The Quality Of Spare Parts On MV. Mulianim Muhammad Dion Putra Widjaya; Ari Yudha Lusiandari; Sri Mulyanto Herlambang; Antonius Edy Kristiyono; Shofa Dai Robbi
Journal of Engineering Science and Technology Management (JES-TM) Vol. 6 No. 3 (2026): September 2026
Publisher : Journal of Engineering Science and Technology Management

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jestm.v6i3.484

Abstract

The operational reliability of a ship's steering gear system is vital for navigation safety and vessel maneuverability, as regulated by International Maritime Standards (SOLAS). However, performance degradation often occurs due to inadequate maintenance practices and spare part constraints. This study aims to analyze the root causes of suboptimal steering gear performance on MV. Mulianim using a qualitative case study approach. Data were gathered through direct field observations, semi-structured interviews with chief and engine officers, and documentation audits (Engine Log Book and PMS records) over a 12-month period. Data validity was verified through source triangulation and analyzed using Miles and Huberman’s interactive model combined with Cause-and-Effect Analysis. The results revealed that steering gear hydraulic pressure dropped below the operational baseline (85–90 bar vs. standard 100 bar) due to high fluid turbidity, degraded viscosity, and internal bypasses. This condition was directly triggered by a 26.7% delay in Planned Maintenance System (PMS) tasks and severe spare part stockouts (25% critical spares unavailable). To prevent navigational hazards, strict adherence to PMS schedules and optimization of the spare part procurement pipeline are strongly recommended.
Co-Authors Abdi Seno Ady Wijaya Agus Prawoto Akhmad Kasan Gupron Andy Dwi Ardiyanto Ardhiana Puspitacandri Ari Yudha Lusiandari Aziz Nugroho Bima Nurrahma Dhany Fachrudin, Achmad Dirhamsyah Eko Prayitno Hadi Setiawan Hariyono Hariyono I Made Dody Permana I Putu Genta Maha Permana Wiratmo Ibnu Septian, Wahyu Imam Sutrisno Kuntoro Bayu Ajie Marshelino Chandra Suhartono Moh Ghufron Muhtadi Muhamad Ghali Pw Carwito Muhammad Dion Putra Widjaya Nazha Madeza Bakri Novitasari Novitasari Nurdiansari, Henna Petrisia Widyasari Sudarmadji Prima Yudha Yudianto Rinanto, Noorman Saiful Irfan Shofa Dai Robbi Sri Mulyanto Sri Mulyanto Herlambang Teguh Pribadi Trisnowati Rahayu Wisnu Bachtiar Fanani Wulan Marlia Sandi