The Allison 501-K17 Ship Service Gas Turbine Generator Set (SSGTGS) is used is provide ship board electrical power on several U.S. Navy Class ships, including the DD-963 Spruance Destroyer, the DDG-993 Kidd Guided Missile Destroyer and CG-47 Ticonderoga Guided Missile Cruiser Classes. The first of these units were placed in service during the mid 1970s. The Naval Sea Systems Command (NAVSEA) in conjunction with the Naval Surface Warfare Center, Carderock Division, Ship Systems Engineering Station (NSWCCD-SSES) have undertaken a major upgrade effort to improve the reliability, operation, serviceability and maintainability of the unit. This paper examines the process of this program and details the specific improvements made to the unit as a result of this effort. In addition, this paper outlines the experience gained as a result of installing these upgrades in the Fleet.

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