Perform an analysis at system level using FTA and FMECA to assess failure of the IGB.
Perform an analysis at system level using FTA and FMECA to assess failure of the IGB. This should consider the reliability at the point of dispatch as well as in flight.
Discussion of system reliability issues and recommendations for changes to design or maintenance tasks in relation to FTA and FMECA Analysis.
Task 2
Your analysis should now be expanded to include the reliability of the Main gearbox lubrication system. Figure 3 shows a Reliability Block Diagram for Loss of Oil Pressure. This should be integrated into your analysis for the transmission system. Although the analysis should focus on the IGB and Main Gearboxes, you should consider the effect of reliability on aircraft safety as a whole. For any critical items, you should suggest possible maintenance actions, either preventative or corrective, and/or any condition monitoring for dormant faults. You will need to justify your analysis with your own research and good engineering judgment. However, there is no need to develop any aircraft diagrams.
Also discuss the system reliability issues and recommendations for changes to design or maintenance tasks.
Solved by verified expertStep 1: Define the scope and objectives of the analysis
In this step, we need to define the scope and objectives of the analysis. For example, we can define the scope as the IGB system and the objectives as identifying the potential failure modes and their consequences.
Step 2: Identify the components and functions of the IGB system
In this step, we need to identify the components and functions of the IGB system. The IGB system consists of various components such as gasifiers, turbines, compressors, heat exchangers, etc. We also need to identify the functions of each component.
Step 3: Identify potential failure modes
In this step, we need to identify potential failure modes of each c
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Step 4: Develop a fault tree
In this step, we need to develop a fault tree that illustrates the potential failure modes and their causes. The fault tree should be developed in a logical and systematic way. The top event of the fault tree can be the failure of the IGB system.
Step 5: Assign probabilities and consequences to the events in the fault tree
In this step, we need to assign probabilities and consequences to the events in the fault tree. The probabilities can be based on historical data or expert judgment. The consequences can be assessed based on their impact on the system.
Step 6: Calculate the criticality of each event
In this step, we need to calculate the criticality of each event in the fault tree. The criticality can be calculated based on the probability and consequences of the event. The criticality can be used to prioritize the events for further analysis.
Step 7: Conduct an FMECA analysis
In this step, we need to conduct an FMECA analysis to assess the potential failure modes, their causes, and their effects on the system. The FMECA analysis should be based on the criticality of the events identified in the fault tree.
Step 8: Develop recommendations for mitigating the potential failure modes
In this step, we need to develop recommendations for mitigating the potential failure modes. The recommendations can be based on the results of the FMECA analysis. The recommendations should be prioritized based on their potential impact on the system.
Overall, FTA and FMECA are useful tools for assessing the failure of complex systems such as the IGB. These tools can help identify potential failure modes, their causes, and their consequences, and can help develop recommendations for mitigating the potential failure modes.
