Life cycle SDLM cost models of the E-2C Hawkeye under the ASPA program
McFerren, Michael G.
Boger, Dan C.
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Standard Depot Level Maintenance (SDLM) was conducted on every E-2C in the United States Navy's inventory on a given time interval. The Aircraft Service Period Adjustment (ASPA) implemented in 1985 was designed to reduce the life cycle cost of maintaining an airplane by reducing the number of times the airplane is inducted into SDLM. This changed the maintenance policy from one that is based on a time interval to one that is based on inspection results of airplane material condition. This thesis investigates the long term effect of the ASPA program on airplane life cycle SDLM costs. Through the use of regression models built from data obtained from NADEP North Island San Diego, this thesis analyzes the effect of tour length (the time between SDLM inductions) on both the individual SDLM cost and the life cycle SDLM costs of a typical E-2C. Graphical analysis shows the optimal tour length for a typical E- 2C that minimizes the life cycle SDLM costs.
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