his research involves two major case studies. Both look at the current maintenance practices done by the United States Army and propose a solution for improvement utilizing condition-based maintenance (CBM) practices. Each study details a cost avoidance that can be earned by implementing the solutions and the resulting benefits that can be experienced.;Case Study I is a return on investment (ROI) that analyzes the benefits of the implementation of elastomeric wedges as vibration control on the Apache (AH-64D) aircraft. Analysis of the material and operational costs shows that the use of self-adhering elastomeric trailing edge wedges on the Apache helicopter in main rotor blade tracking operations will significantly reduce the number of blades damaged by tab bending that must be repaired at the depot level. Wedge implementation will also allow for a decrease in the number of test flights and maintenance man hours associated with those flights. Additionally, the wedges will lower aircraft vibration levels. A 10-year ROI is calculated for projected peacetime flying hours and for the current flying rate. Dollar values and flight hour optempo (operating tempo) have been removed and replaced with percentages or pseudonyms to comply with the operations security process.;Case Study II examines the maintenance practices regarding the GE T700, T701, T701C, and T701D turboshaft engine. According to the Aviation and Missile Command's (AMCOM) integrated priority list, the turboshaft engine is the number one cost burden to the Army with Army Working Capital Fund (AWCF) sales exceeding
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