scholarly journals FAILURE OF ELECTRIC MOTOR-DRIVEN PUMP BOEING SYSTEM 737-800

Vortex ◽  
2021 ◽  
Vol 2 (1) ◽  
pp. 51
Author(s):  
Anggun Nurul Hidayah

This study aims to determine the results of the analysis of the causes  a failure that occurred in the Electric Motor-Driven Pump system on an aircraft. Boeing 737-800. The data used is in the form of a Pilot Report from the Batik airline.Water in the period 2013 to 2020.The method used in this research is Failure Mode and Effect Criticality Analysis (FMECA). FMECA is a method used to analyze the causes of damage to a system / component,along with the effects if there is damage to the system / component. The first step in this research is to find case data happened to the hydraulic system (ATA 29) on the airline Batik Air, then perform data processing. From the results of the analysis, the results of the RPN value on Electric Motor-Driven.The highest pump is because EMDP cannot supply pressure to the system. Based on the RPN calculation, the RPN value was obtained at 12. This value obtained from the matrix in the safety standard manual from Batik Air.

2020 ◽  
Vol 4 (3) ◽  
pp. 205
Author(s):  
Dimas Bayu Pinandoyo ◽  
Asriadi Masnar

Background: BPOM stated that in 2017, small and micro food enterprises were responsible for 49,5 % food borne disease in Indonesia. Indonesian government had provided guidance about good handling standard for food product (GMP) by UU No.18 Tahun 2012. ALOJA as Small and Medium Enterprise (SME) had lot of limitation to meet the standard. HACCP analysis was needed to give recommendation in arranging SOP that meet the standard.Objectives: The objective of this research was to do and set HACCP analysis as a way to collect data to give recommendation in setting the SOP that meet food safety standard regulation.Methods: Research done by applying 7 of 14 steps in HACCP implementation. Judgment taken based on the level of severity (3 level) and level of occurrence probability (3 level). From the matrix derived from it, SOP recommendation was taken if the level of control was medium and above.Results: Recommendation given for Pest Control procedure, washing and dipping, cooling, packaging and sealing process.Conclusions: The result shown that pest control procedure, washing and dipping, cooling, packaging and sealing process was on medium risk or above. SOP recommendation done by adding nylon net sized 80 mesh and check it regularly, control the concentration of lime betel, limit and regulate the cooling room strictly, and to apply aseptic condition. If this not possible, the best option was to apply washing hand and feet procedure with soap/hand sanitizer, masker, cover the hair of worker during packaging and sealing.ABSTRAK  Latar Belakang: Pada tahun 2017 BPOM menyebutkan bahwa Industri Kecil Makanan berkontribusi terhadap 49,5% kasus keracunan pangan di Indonesia. Pemerintah melalui UU No. 18 Tahun 2012 telah mengatur mengenai prosedur pengolahan pangan yang baik (CPPB). ALOJA sebagai UKM produsen minuman siap saji Aloe vera memiliki keterbatasan dalam sarana-prasarana dan SDM sehingga pemenuhan standar produksi pangan yang baik sulit untuk diterapkan. Analisis HACCP perlu diterapkan untuk memberikan masukan dalam penyusunan SOP dalam alur produksinya sehingga memenuhi standar produksi pangan yang baik.Tujuan: Penelitian ini bertujuan untuk melakukan analisis dan menetapkan aturan HACCP sebagai bahan rekomendasi dalam penyusunan SOP yang memenuhi persyaratan standar produksi pangan yang baik.Metode: Metode yang digunakan dalam penelitian ini adalah dengan menerapkan 7 dari 14 langkah dalam HACCP. Metode penilaian didasarkan pada keparahan (Severity) skala tiga dan tingkat kemungkinan terjadinya (probability) skala 3. Rekomendasi SOP disusun pada resiko medium hingga tinggi yang diperoleh dari matriks severity vs probability.Hasil: Dalam analisis HACCP ini ditemukan bahwa tahap yang masih memiliki resiko menengah ke atas adalah tahap pengendalian hama, pencucian dan perendaman, pendinginan, dan pengemasan-penyegelan. Rekomendasi yang diberikan adalah dengan menambahkan jala nilon ukuran 80 mesh pada ventilasi udara dan melakukan pengecekan rutin terhadap kondisi jala nilon pengontrolan konsentrasi kapur sirih yang digunakan, dengan menyusun regulasi yang ketat untuk ruang pendinginan,dan penerapan kondisi aseptis atau minimal dengan adanya penyuci hama untuk tangan, masker, penutup kepala, apron yang bersih, dan kaki yang bersih.Kesimpulan: Rekomendasi SOP diberikan pada proses pengendalian hama, pencucian dan perendaman, pendinginan, dan pengemasan-penyegelan. 


2016 ◽  
Vol 22 (2) ◽  
pp. 164-179
Author(s):  
Sergey Golovin

Purpose – The purpose of this paper is to represent replacement policies (rules) in the form of a matrix. Visualization of replacement rules is useful for maintenance records. Matrix representation is more effective than the verbal description usually provided, as it allows better understanding of the specifics of the different replacement rules without careful research of their mathematical models. Design/methodology/approach – This approach employs mathematical models to investigate the simple conditions (requirements) for replacement of system component with illustrative examples. When comparing the different replacement rules a cost structure is applied to takes into account the nature and technology of disassembly assembly actions for the repair unit. Findings – Representation of replacement rules in the matrix form is useful when describing planned replacement models, opportunity replacement models, group replacement models and others, as well as computer modeling of the renewal process. Forming simple conditions for the replacement of system components ensures the total average repair cost is minimized. These conditions can be applied in the early stages of creating a maintenance program for the machine. Practical implications – Replacement matrices can be specified in a technical manual for maintenance of machines to achieve reliable operation and to reduce repair costs. Replacement matrices can be put into practical use for maintenance records and may be included in the maintenance procedures library of CMMSs. Developed in the paper, the replacement matrix, the conditions for replacement of system components and the cost structure will help engineers to make decisions at the time of repair for assembly units. Originality/value – Proposed in the paper is a new approach to the visualization of the replacement rules and cost structure which simplifies the analysis of options for repair actions. The proposed technique contributes to the record of maintenance actions and the decision making process for replacement.


Author(s):  
Noriko Morioka ◽  
Hitoshi Oyori ◽  
Yukinori Gonda ◽  
Kenji Takamiya ◽  
Yasuhiko Yamamoto

This paper describes the experimental rig test result of the electric motor-driven fuel pump system for the MEE (More Electric Engine). The MEE is an aircraft engine system concept, which replaces conventional mechanical/hydraulic driven components with electric motor-driven components. Various MEE approaches have been studied since the early 2000s and one of its key concepts is an electric motor-driven fuel pump [1–4]. The authors commenced a feasibility study of the electric motor-driven gear pump system for what was assumed to be a small-sized turbofan engine. The concept study and system design were conducted, whereupon technical issues for the electric fuel pump system, which both supplies and meters fuel via the motor speed control, were clarified [5, 6]. Since one of the key issues is fuel-metering accuracy, the electric fuel system, including a flow feedback closed-loop control, was designed to ensure accurate fuel-flow metering for aircraft engine applications. To verify the rig system, an experimental model of the electric fuel pump system is assumed for a small-sized turbofan engine. The hardware of the motor-driven fuel pump and flow measurement mechanism, including an FPV (Fuel-Pressurizing Valve) and orifice, were designed, manufactured and fabricated and a differential pressure sensor for flow feedback was selected. Other equipment was also prepared, including a motor controller, power source and measurement devices, and the entire rig set-up was constructed. A bench test using the rig test set-up was conducted to verify the fuel-metering accuracy, response and system stability. Data, including the static performance and frequency response, were obtained for the electric motor, motor-driven fuel pump and entire fuel system respectively. The rig test results indicate the feasibility of the system, which will provide an accurate engine fuel flow (Wf) measurement and frequency response required for actual engine operation, via an electric motor speed control and fuel-flow feedback system, as proposed in the MEE electric fuel system.


Author(s):  
Michael J. Kazmierczak ◽  
Abhishek Gupta

Experiments were performed on a heat exchanger equipped with multiple thermoelectric (TE) modules. The TE-HX serves as the basic system component in a simple hydronic modular Peltier heat pump system designed to provide chilled or hot water for domestic use (or supplementary building climate control) of small residences [1]. The present work focuses on the detailed convection analysis inside the TE-HX component when 10 thermoelectric modules are utilized. The local heat transfer coefficient at different points along the channel are measured at steady-state, first, when a continuous heater is installed and then when replaced with 10 TE modules. The experimental heat transfer coefficients obtained are compared with available empirical correlations for “transition” (3000 < ReDh < 7000) turbulent flow inside the channel with fair-to-good results. Next, the resulting coefficient-of-performance of the TE heat pump system is measured with its value depending both on system input power and water flow rate. Testing showed that performance degradation, i.e. reduced COPs, occurred when operated at higher power levels but remains satisfactory for up to 688 Watts with higher flow rate.


2006 ◽  
Author(s):  
Lois J. Gschwender ◽  
Angie Campo ◽  
Carl E. Snyder ◽  
Shashi K. Sharma ◽  
Tim Jenney ◽  
...  

2012 ◽  
Vol 215-216 ◽  
pp. 1283-1290
Author(s):  
Min Zhang ◽  
Jin Wang ◽  
Guo Bing Huang

In this study, a robust H2 suboptimal control method is proposed for an electro-hydraulic system with variable supply pressure. The H2 suboptimal controller is designed to minimize the sum of a quadratic performance criterion and the H2 norm of the closed-loop transfer function from the white noise disturbance to the system state space variables. The genetic algorithm is used to select the weighting matrices of the quadratic performance criterion. In order to improve the robust performance, parameter uncertainties of the electro-hydraulic system are considered in the process of genetic search. Simulation results demonstrate the effectiveness of the proposed approach.


2020 ◽  
Author(s):  
Alamgir Choudhury ◽  
Prajna Paramita ◽  
Jorge Rodriguez

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