Task 1
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.
Discuss the system reliability issues and recommendations for changes to design or maintenance tasks.
