NEWPORT NEWS, Va. — 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.

Tug boats maneuver Pre-Commissioning Unit Gerald R. Ford (CVN 78) into the James River on June 11, 2016, during the ship's Turn Ship evolution.

Photo Credit: MC3 Mae O. Campbell/Navy