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. +700 words.
FTA (Failure Mode Effect Analysis) and FMECA (Failure Mode, Effects and Criticality Analysis) are two of the most widely used techniques for system-level reliability assessment. When applied to an existing system, such as an aircraft’s IGB (Integrated Ground Test Gearbox) or MGL (Main Gearbox Lubrication) systems, these methods can help identify potential faults in a timely manner and suggest possible corrective actions. In this task, FTA/FMECA analyses will be performed on both the IGB and MGL systems to assess failure of each at both the point of dispatch and in flight.
When considering an aircraft’s IGB system, it is important to understand that a fault in this critical component could have serious consequences if not addressed properly. It is therefore essential that any faults are identified before taking off or during pre-flight checks. To do this, FTA analysis can be employed which looks at how different failures may affect the overall operation of the engine and gearboxes. The analysis considers all inputs to the gearbox as well as any associated sensors or other components that rely on its output signals. Additionally, special attention should be given to safety mechanisms within the system such as pressure switches or overspeed detectors which could monitor potential anomalies before they lead to catastrophic failure of either part of the whole system. If a fault is detected then further investigation using FMECA might be needed so that preventive maintenance procedures can be implemented accordingly (or corrective action taken). This second technique involves identifying every single mode through which failure may occur; assessing how likely each of these modes are; estimating their impact; determining what corrective action should take place; working out whether further monitoring is required post-repair; and finally assigning probabilities based on previous experience with similar systems/components if data from past incidents exists.
Next we must consider MGL systems which provide lubrication for sensitive parts within main gearboxes ensuring smooth operation even under extreme conditions where high pressures exist inside certain components due to fast rotation speeds resulting from jet engines operating at full thrust power levels during takeoff or landing scenarios for example.. As with IGB systems FMECA / FTA analyses should also be performed here so any potential issues are quickly identified before they result in catastrophic failure leading potentially loss of control midair – dangerous situation indeed! To do so requires careful examination into various factors such as available resources: reliable supply power? Uninterrupted coolant flow? Adequate spares availability? Proper maintenance scheduling etc., Also must keep mind concerning oil wear/tear rate & contamination effects too as typical problems usually arise due \to wear materials entering circulation over time causing blockages eventually leading sudden loss oil pressure upon startup when viscosity drops below minimum acceptable level!
Finally there needs consideration regarding general airworthiness standards imposed by aviation authorities worldwide – FAA being one major example whose regulations must meet no matter design complexity whatsoever! Suggest changes related maintainability tasks mentioned above henceforth shall benefit greatly reducing chance fatal accidents involving particular model type under study due improved reliability confidence despite fact complex nature modern day assemblies demand constant vigilance ensure safe operations remain top priority operators/owners alike!
In conclusion it is clear that proper application of both FTA & FMECA will help determine root cause if any issues arise affecting performance quality one has come expect from critical components like those discussed herein thus allowing corrective precautions taken minimise risk life damaging events associated flying public safely skies across world today!