An electrical fault from an improperly disconnected battery in a used vehicle led to the fire aboard vehicle carrier Höegh Xiamen that resulted in $40 million worth of damages, the National Transportation Safety Board (NTSB) said Thursday.As a result of the investigation, NTSB issued eight safety recommendations to federal regulators and the companies involved in the accident.On June 4, 2020, while the Höegh Xiamen was in Jacksonville, Fla., the ship's crew noticed smoke coming from the ventilation housing while preparing to depart port for Baltimore, Md.