The ship suffered an engineering casualty while transiting from Halifax, Canada, to Mayport, Florida, and ultimately its home port of San Diego. The cause is being evaluated by ship’s crew and technical consultants.
Initial indications are that fine metal debris collected in the lube oil filter caused the system to shut down, according to a Navy statement provided to Navy Times. The cause of the metal debris in the lube oil system is not known and assessments are ongoing.
The ship was commissioned Nov. 21 in Milwaukee, Wisconsin, and has been making the long trek to San Diego through the Great Lakes since.
Problems with the propulsion plant began almost as soon as Milwaukee got underway from Halifax. The ship’s computer system triggered an alarm and the ship called away an engineering casualty.
Engineers cleaned out the metal filings from the lube oil filter and locked the port shaft as a precaution. In the early hours of Friday morning, the ship was conducting steering tests and lost lube oil pressure in the starboard combining gear due to the presence of the same metal filings in that filter.
The metal filings in the lube oil have not been a class-wide issue, according to the Navy.
The ship then dropped anchor while the engineers worked on the system. By mid-morning, the salvage ship Grapple rendezvoused with Milwaukee and connected a towing hawser line for the trip back to Little Creek.