USS Benfold lost power for four days in the South China Sea after a generator failure, forcing the Navy to tow the destroyer to Subic Bay.
https://www.foxnews.com/politics/massive-risk-south-china-sea-exposed-four-day-power-loss-us-navy-destroyer
https://www.foxnews.com/politics/massive-risk-south-china-sea-exposed-four-day-power-loss-us-navy-destroyer