Abstract
This paper presents a conceptual design decision making approach through operational modeling through the eyes of the airline. It put more emphasis on the engine maintenance, repair and overhaul, since engine maintenance is about 13% of the total cash cost. A key element of the research is a simulation program through Operation Simulation Modelling OSM, that has been built by the others to create an operational modelling environment to see the impact of different design technologies, or concepts, or compare different type of engines operation on a real environment through the eyes of the customer (i.e. the airline engineers and mechanics). The Rolls Royce engine (RB211-524D4) for a specific airline has been chosen to be the case study and validate the code in case of man-hours. Finally, it was found that OSM givens outcome for the baseline maintenance hours, and man hours needed give an difference 2.7% and 0.8% respectively.
Highlights
The nature of this paper in the field of engine conceptual decision making design is exploring areas considerably outside the traditional design space.Since engine maintenance is about 13% of the total cash cost [1], and since design has shifted from design for performance at any cost to design for affordability, engine maintenance is about 6% of DOC [1], it is important for the airlines that their aircraft fly most of the time with less maintenance time spend for their aircraft and engines, so the time for the engine to be maintained is important.Since this study deals with fleet engines performance in maintenance, man hour spend it was one of the most challenging tasks to validate the data output
An airline helped by supplying data for their Rolls Royce engines which includes the man hours needed and time for maintaining an engine, and most important the steps and phases that the engine goes thought in an over hall job, which Include the different shops and tasks taken for the main parts
OSM code was written in a Visual Basic [3,4], it was used to generate data for over hall engine maintenance man hours, by running OSM for a single engine from its removal to its Instillation in the aircraft, generating maintenance time in min, and man – hours needed, with a difference of 2.7% and 0.8% respectively compared with data provided from the airline
Summary
The nature of this paper in the field of engine conceptual decision making design is exploring areas considerably outside the traditional design space. Since this study deals with fleet engines performance in maintenance, man hour spend it was one of the most challenging tasks to validate the data output. An airline helped by supplying data for their Rolls Royce engines which includes the man hours needed and time for maintaining an engine, and most important the steps and phases that the engine goes thought in an over hall job, which Include the different shops and tasks taken for the main parts. The objective of this paper is to focus on the operational aspects of the implementation of a given engine design to airline maintenance shops capability to fully evaluate its impact through the eyes of the operators. For example a particular engine might improve s.f.c. but due to the additional maintenance requirements does not save time or money overall
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