The fire is the fourth to break out on a Navy ship in recent months.
The agency also found poor communication between the bridge and combat information center contributed to the accident.
The Navy has recovered a $2 million anti-mine pod dropped by one of its helicopters this month off the coast of Virginia.
Damage on some decks spanned the length of the 844-foot ship and reached 106-foot-high ceilings, the CNO said.
Chief of Naval Operations Adm. Mike Gilday said the Navy is launching three investigations into the ship's fire.
Firefighters have extinguished blazes on the Navy amphibious assault ship Bonhomme Richard after four-plus days of efforts.
Forty sailors and 23 civilians have been hurt battling the blaze on the amphibious assault ship Bonhomme Richard.
Hundreds of Navy and other federal firefighters have been fighting for days to put out the blaze.
The sailor was a second-class petty officer, according to data from the Naval Safety Center, which tracks mishaps at sea
Lt. Natalie Combs was censured in April for failure to perform her duties.
Ron Shurer's life was remembered Tuesday as a many-chaptered love story of selfless giving.
The delivery of the first four ISVs is part of a 650-vehicle deal worth up to $214.3 million.
Two former North Carolina-based Marines were among three men arrested on federal weapons charges last week.
The move to create a separate institution will distinguish Space Force and its warfighting roles from those of the Air Force.
Scientists are prototyping a "close combat assault ration'' containing an assortment of nutrient-dense energy bars.