Lube oil system contamination caused damage to the amphibious transport dock ship San Antonios diesel engines that may cost $7.5 million to correct, a recent U.S. Navy investigation concluded.
The operational impact is such that repairs may preclude San Antonio executing her next scheduled deployment, the report found.
The San Antonio is the first ship in its class. Other ships in its class will include the San Diego, Anchorage, Arlington and Somerset.
In a statement, Northrop Grumman said the reports finding supported findings from an industry and Navy technical team investigation into the ships engines bearing damage in the spring. The company asserted it was focused on corrective actions.
Northrop Grumman on July 13 announced plans to consolidate its Gulf shipyards, including winding down ship construction at Avondale in 2013. The defense contractor said it would explore strategic alternatives for its shipbuilding business.