NEWPORT NEWS, Va. (AP) - Officials say the U.S. Navy's most expensive aircraft carrier will miss another delivery deadline.

Navy spokeswoman Capt. Thurraya Kent tells the Virginian-Pilot USS Gerald R. Ford won't meet November's delivery deadline.

The $12.9 billion USS Gerald R. Ford is being built at Huntington Ingalls Industries Inc. in Newport News.

Kent says in June and again in July, two of Ford's electricity-generating main turbines had problems.

Tests are being conducted, and Kent says a new delivery date has not been set.

The carrier had been expected to be delivered in 2014.