Add Zumwalt Class to list of new Navy ships having engineering problems

 The Zumwalt-class guided-missile destroyer DDG 1000 is floated out of dry dock at the General Dynamics Bath Iron Works shipyard. (Photo: U.S. Navy)

The Zumwalt-class guided-missile destroyer DDG 1000 is floated out of dry dock at the General Dynamics Bath Iron Works shipyard. (Photo: U.S. Navy)

With at least five littoral combat ships needing time in the repair yard after engineering problems, and USS Gerald R. Ford (CVN 78) suffering her own power plant problems, the Navy took another hit when USS Zumwalt (DDG 1000) ended up on the binnacle list as well.

According to a report by USNI News, the 16,000-ton destroyer suffered a seawater leak in an auxiliary system for one of the ship’s propeller shafts. The destroyer is currently undergoing repairs at Norfolk Navy Yard. The repairs are expected to take up to two weeks.

The Zumwalt has had other issues – the new integrated power system caused extensive delay – and was cut from a planned purchase of 32 destroyers to three. Each ship in the class is armed with two 155mm Advanced Gun Systems, the largest guns to see Navy service since the retirement of the Iowa-class battleships. The vessels also carry 30-millimeter Mk 46 Bushmaster II chain guns, and twenty four-cell Mk 57 vertical launch systems. They have a top speed of over 30 knots.

The three vessels being built with cutting-edge technology will cost a total of $22 billion, including $9.6 billion for R&D. Each of the three hulls, therefore, is bearing $3.2 billion in R&D costs. Had the original 32 ships been procured, the per-ship R&D burden would have been only $300 million per ship.

The cut in program size nearly led to the entire cancellation of the program under Nunn-McCurdy, which requires that the Department of Defense notify Congress if unit cost exceeds estimates by 15 percent. When the unit cost exceeds estimates by 25 percent, Nunn-McCurdy requires that the program is to be terminated unless DOD can certify that certain conditions have been met.

In a release about the incident, the Navy noted, “Repairs like these are not unusual in first-of-class ships during underway periods following construction.”

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