AIRCRAFT ENGINE LIFE CYCLE COST GUIDE

<div class="section abstract"> <div class="htmlview paragraph">AIR 1939 addresses communication of LCC data between equipment suppliers, aircraft engine producers, aircraft manufacturers, and users, as illustrated in <span class="xref">Figure 1</span>. The LCC data categories addressed include: research, development, test and evaluation (RDT&amp;E); acquisition (initial procurement and investment); and operating and support (O&amp;S) costs. While input and output formats are suggested, calculation procedures and cost methodology are specifically excluded since many LCC models preferred by the industry are company sensitive or proprietary (<span class="xref">Figure 1</span>). The relationship of LCC input data to program phase is described. Ground rules and assumptions are addressed. A glossary of LCC terms is provided. The LCC impact of propulsion systems on other aircraft systems is considered.</div> <div class="htmlview paragraph">This document was specifically developed for military propulsion system cost analysis. However, it is believed that a functional relationship exists between military and commercial Life Cycle Cost analysis and that with some interpretation, sections of AIR 1939 might be applicable to commercial propulsion systems as well.</div> <div class="htmlview paragraph">In summary, AIR 1939 provides a basis for LCC calculations, for monitoring of LCC status resulting from trade studies, and for tracking status against LCC goals in a consistent manner, thus permitting quantitative, comparable assessment. AIR 1939 guidelines recommend that a Life Cycle Cost presentation include consideration of overall cost rather than a sub-optimization of just one or a few cost elements.</div></div>