"An engineering casualty"
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https://www.defensenews.com/naval/2020/10/28/another-littoral-combat-breaks-down-on-deployment/
The littoral combat ship Detroit is limping back to Mayport, Florida from a deployment to South America in a move that marks the latest setback for the Freedom variant’s complicated propulsion system.
Three sources familiar with the situation told Defense News the casualty is in Detroit’s combining gear, which is a complex transmission that connects power from two large gas turbine engines and two main propulsion diesel engines to the ship’s propulsion shafts, which propels the ship through the water with water jets.
Detroit will redeploy to Southern Command when repairs are completed, U.S. 4th Fleet Commander Rear Adm. Don Gabrielson said in a statement.
“USS Detroit (LCS 7) experienced an engineering casualty during routine operations, and a technical evaluation determined that in-port repairs would be required,” the statement read. “USS Detroit has been a vital and productive asset and will be redeployed as soon as possible.”
