Parallel Series Schedulling for Aircraft Overhaul Maintenance

Abstract

Overhaul maintenance of an aircraft is carried out periodically based on the age standard of its flight hours. The overhaul maintenance can also be executed when there is an emergency condition which requires heavy maintenance. Hawk MK-209 aircraft previously needed overhaul time as per technical orders for 283 working days or equivalent to 14 months. By arranging the maintenance activities and considering the logic of dependence, using Critical Path Method (CPM) and Project Evaluation and Review Technique (PERT), the aircraft's overhaul time can be accelerated to 81 working days, equivalent to four months. This achievement was continued by involving consideration of the parallel series maintenance scheduling method with the help of MS Project and Arena Simulation so that the total overhaul time was only 31working days per aircraft. Thus, the combined CPM PERT and parallel series scheduling methods through Arena simulation, can result in total efficiency of overhaul time per aircraft from 283 working days to 31 working days, or equivalent to 89% efficiency. Keywords—Parallel Series, Scheduling, Maintenance, Aircraft, Efficiency.