Reliability of Rotor Transmission System
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.
FTA will evaluate how certain failures at one level affect higher levels, while FMECA is more focused on determining what could go wrong with individual components or systems and how these problems may potentially cause further accidents if left unchecked. The main benefit of using both methods together is that they provide a comprehensive assessment for aircraft safety by analyzing subsystems as well as their interactions with other systems in the same aircraft.
To analyze the reliability of IGB and Main Gearboxes, there are several factors that need to be considered such as maintenance history, design defects, manufacturing flaws, operating environment and temperature variations etc. Additionally, any changes made to either part must be evaluated for safety implications before being implemented across all aircraft types under consideration. The FMECA report must include detailed descriptions of all potential failure modes associated with each component along with appropriate mitigation plans which should address both hardware-related issues and suggestions for preventive maintenance tasks based on experience gained from previous operation incidents involving similar gearboxes/engines designs.
Finally, measures like condition monitoring should also be taken into account to detect latent faults quickly so that corrective action can be initiated before they cause serious damage or injury during flight operations. This would involve regular inspection and testing procedures conducted by qualified personnel at scheduled intervals which will help minimize downtime due to unexpected repairs or replacements due to sudden mechanical breakdowns caused by undetected discrepancies between actual operational conditions compared against idealistic parameters set out by manufacturers