Strategy Development for Survival & Growth of MRO Company during & Post Covid-19 Pandemic (Case Study: GMF Aeroasia)

Indonesian Aviation Market 2020 was predicted to grow around 7.0% compared to 2019. It gave Indonesian MRO industry an optimism at first, at least in the beginning of the year, before WHO declared COVID-19 pandemic in March 2020. The COVID-19 pandemic has a dire impact on the aviation & MRO industry. As of July 2021, flights still haven’t reached 50% compared to pre-COVID era. Many MRO companies, including GMF AeroAsia, must face an unprecedented situation that caused the market to shrink significantly, and enter the financial distress zone. Several initiatives have been taken by the company. However, with the protracted pandemic conditions and the uncertainty of Indonesian Aviation Market recovery, further strategies are needed to survive and growth. This study aims to analyze the company and develop a strategy based on 2 stages, namely the retrenchment phase and the recovery phase. The retrenchment phase will focus on the survival strategy, while the recovery phase will focus on the growth strategy using scenario planning because the future is still uncertain. From the analysis and interviews, several initiatives and strategies for survival and growth were developed. Several initiatives for survival include headcount cuts, operational efficiency, product elimination, liquidation & divestment, equity for debt swaps, and renegotiate with lenders. While the growth strategy was developed based on 4 scenarios, namely Flying Through Thunderstorm, Flying with Engine Failure, Flying with Broken Wings, and Flying Zig-Zag.

A FUZZY DEMATEL MODEL PROPOSAL FOR THE CAUSE AND EFFECT OF THE FAULT OCCURRING IN THE AUXILIARY SYSTEMS OF THE SHIPS’ MAIN ENGINE

The ship engine room has a structure that meets a number of needs related to administrative conditions. Even if a simple mechanical error is considered to be the addition of human errors into the complex structure of the engine room, it can lead to undetected loss. How the causes and effects of the detected faults affect the system is as important as an effective fault detection system to detect the fault and take immediate action against any possible engine failure. This study reveals the causes of problems occurring in the main engine auxiliary systems including cooling, lubricating, cooling oil and fuel systems, and the extent of these problems affecting the system. While the Decision Making Trial and Evaluation Laboratory supports to identify and analyze the error detection of auxiliary systems with respect to causal effect relation diagram, fuzzy sets deal with the uncertainty in decision-making and human judgements through the DEMATEL. Therefore, fuzzy DEMATEL approach is applied to examine the causes and the weights of the faults and their relation to each other in the auxiliary systems. When we look at the result of the proposed approach, fuel oil pump failures has more impact on the all system and air cooler problems has the second highest place among the all errors.

Combustion Fault Simulation of Diesel Engine Based on AVL-FIRE Software

Marine diesel engine is developing towards the direction of precision, automation and systematization, and it has the characteristics of complex structure and many parts. If it breaks down, it will affect the operation safety of the whole ship. If it is serious, accidents may occur, which may cause maritime accidents. Therefore, how to prevent the occurrence of marine diesel engine failure and analyze the cause of failure after the accident has been paid more and more attention by scholars at home and abroad. In the simulation study of the working process of diesel engine, for different types of diesel engines, the laws of combustion process are different, even for the same diesel engine in different working conditions, the combustion laws are also different, which will cause great difficulties to study the combustion process. Using computer simulation technology, the physical calculation model of diesel engine system is established by simulating the typical combustion faults of marine diesel engine. AVL-FIRE software is used to simulate different faults of diesel engine combustion process, and the changes of various performance parameters of diesel engine under corresponding faults are obtained, so as to grasp its working state macroscopically, and provide relevant basis for the design, optimization and operation management of diesel engine system.

FEM analysis of the opposed-piston aircraft engine block

An important aspect of aircraft engine design is weight minimization. However, excessive weight reduction may reduce mechanical strength of the engine. This is especially important for aero-engines due to consequences of engine failure in flight. The article presents the results of the FEM opposed-piston diesel engine block model tests. The tested engine is a PZL-100 two-stroke three-cylinder aircraft engine with two crankshafts and six pistons. Air is supplied via a mechanical compressor and a turbocharger. Stress in the engine block is induced by the operating process of the engine block. The pressure in the combustion chamber of the analyzed engine is 13 MPa. The pistons in one of the cylinders are then near their TDC, the deflection angle of the connecting rods is small so almost the entire piston force is transferred to the crankshafts and then to the main bearing supports. This results in the occurence of a tensile force for the engine block applied in the bolt holes of the shaft supports. The calculation results are presented as stress and displacement distributions on the surface and selected block sections. The maximum values on the outer surfaces of the block occurred in the area of the compressor attached to the block and reached 39 MPa. Maximum stresses were, however, observed inside the block on the air and exhaust flow separators between the cylinder liners. The stress value on the outlet side reached 44 MPa.

Features of flow around transport aircraft model with running propellers by modelled engine failure in wind tunnel

This paper presents the experiment results of modelling the one engine failure at the landing mode on a model of a light transport airplane in the T-102 TsAGI low speed wind tunnel. The effect of starboard and port engines failure on the aerodynamic characteristics and stability of the model is researched. The model maximum lift coefficient is reduced about ≈8% and there are the same moments in roll and yaw for starboard and port engines failure case. It was found that the failure of any engine has little impact on the efficiency of control surfaces. Approaches of compensation of forces and moments arising in the engine failure case were investigated.

Continuous monitoring method when diagnosing the technical condition of tractors using digital systems

The proposed method is aimed at the development and implementation of new intelligent technologies that make it possible to increase the effectiveness of the diagnostic process and the reliability of the functional technical characteristics of the engine operation of automotive equipment in the agro-industrial complex. The article presents the results on substantiation and development of a digital system based on neural network interaction. The advantage of the method is the evaluation of tractor health under the condition of automation of diagnostic processes. The ability to determine not only the cause of engine failure, but also to assess the efficiency of the agricultural machine as a whole. Proposed neural network is able to perform analysis and transfer of obtained data during diagnostics to database of special program or server.

Quantitative assessment of pilot-endured workloads during helicopter flying emergencies: an analysis of physiological parameters during an autorotation

The procedures to be performed after sudden engine failure of a single-engine helicopter impose high workload on pilots. The maneuver to regain aircraft control and safe landing is called autorotation. The safety limits to conduct this maneuver are based on the aircraft height versus speed diagram, which is also known as "Dead Man’s Curve”. Flight-test pilots often use subjective methods to assess the difficulty to conduct maneuvers in the vicinity of this curve. We carried out an extensive flight test campaign to verify the feasibility of establishing quantitative physiological parameters to better assess the workload endured by pilots undergoing those piloting conditions. Eleven pilots were fully instrumented with sensors and had their physiological reactions collected during autorotation maneuvers. Our analyses suggested that physiological measurements (heart rate and electrodermal activity) can be successfully recorded and useful to capture the most effort-demanding effects during the maneuvers. Additionally, the helicopter’s flight controls displacements were also recorded, as well as the pilots’ subjective responses evaluated by the Handling Qualities Rate scale. Our results revealed that the degree of cognitive workload was associated with the helicopter’s flight profile concerning the Height-Speed diagram and that the strain intensity showed a correlation with measurable physiological responses. Recording flight controls displacement and quantifying the pilot's subjective responses show themselves as natural effective candidates to evaluate the intensity of cognitive workload in such maneuvers.