The Navy’s Landing Craft Air Cushion (LCAC) hovercraft vehicles use two Auxiliary Power Units (APUs) to provide bleed air to start the main propulsion TF40B or ETF40B engines. Each main propulsion engine is assigned a normally closed starter shutoff valve to permit APU bleed air to pass to the main propulsion engine air starters. These starter shutoff valves are seizing due to corrosion and prohibit airflow needed to start the main engines. This paper will describe the planned study to identify and resolve starter shutoff valve failures.

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