ESTIMATION OF DAILY UNSCHEDULED LINE MAINTENANCE EVENTS IN CIVIL AVIATION

摘要

Reducing maintenance cost in today's aviation industry is a necessary step to participate in a market under excessive cost pressure. Airlines as well as maintenance, repair and overhaul companies have to cut costs wherever possible. An improved MH planning for unscheduled maintenance events could help avoiding expensive overcapacities in certain time slots. A statistical model expressing the occurrence of failures as a stochastic process is developed. Unscheduled maintenance events of a homogeneous modern fleet are analysed to determine representative failure rates for each aircraft system. The model allows daily MH demand estimates for small aircraft fleets of 15 or 20 aicraft with accuracy of around 75 %.