NTSB cites loosened bolts in Carnival Liberty fireJul 7, 2017 09:39 AM
Improper tightening and vibration likely led to the incident involving a diesel generator
The fire can be seen in this image from one of the ship's closed-circuit TV cameras.
The following is a marine accident brief from the National Transportation Safety Board (NTSB):
(WASHINGTON) — On Sept. 7, 2015, about 1133 local time, a fire broke out in the engine room aboard cruise ship Carnival Liberty. At the time, the vessel was alongside the dock in the Port of Charlotte Amalie, St. Thomas, U.S. Virgin Islands. The master ordered the passengers aboard the vessel to evacuate to the dock. The crew used the ship’s water mist and carbon dioxide (CO2) firefighting systems to extinguish the fire. No one was injured, nor was any environmental damage reported. Fire damage to the ship was estimated at $1.72 million.
The National Transportation Safety Board determines that the probable cause of the engine room fire aboard Carnival Liberty was loosened bolts, likely resulting from improper tightening during prior maintenance and vibration of the piping over time, on a fuel supply inlet flange on diesel generator 4, which triggered an uncontrolled fuel spray from the inlet flange onto a hot surface on the diesel generator.
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