Proposed Maintenance Scheduling Using Failure Mode and Effect Analysis and Monte Carlo Methods on Critical Components

PT Dirgantara Indonesia (PTDI) is an aerospace company that focuses on the design, production and service of aircraft for the civil and military markets. However, in the aircraft component production process at PTDI, there is a JOBS AABG01 engine which often experiences damage and requires a long repair time. This condition hampers the production process and can cause delays in the delivery of components to consumers. This research aims to reduce machine downtime, increase production efficiency, and schedule component replacement on JOBS machines at PTDI. To overcome this problem, it is necessary to carry out routine and periodic preventive maintenance. Preventive maintenance involves regular monitoring, inspections and maintenance to keep machines in good condition. Apart from that, it is also necessary to schedule replacement of critical components based on Failure Mode and Effects Analysis (FMEA). By implementing preventative maintenance and scheduling component replacements, it is hoped that machine downtime can be reduced, the production process runs more smoothly, and delivery targets can be achieved. The research results show that the time interval for replacing components for preventive maintenance is carried out routinely and periodically before the component is damaged once every 27 days. However, if during the inspection in Preventive Maintenance the condition of the component is still good and it is estimated that it can still be used until the next period, then it can be checked again in the next period in Corrective Maintenance. Maintenance schedule on day 49 to check and replace components. With this maintenance schedule, the company will avoid fatal damage that could stop production.