A machinery space fire onboard a relatively new vessel was effectively responded to and extinguished by the vessel’s quick response team firefighters using portable extinguishing equipment.
However, before it was declared completely extinguished and approximately five hours after the fire started, the master of the vessel made the decision to release CO2 from the vessel’s fixed firefighting system. It failed to operate as designed.
Subsequently, crewmembers were unable to activate it manually and CO2 was never directed into the machinery space.
The following issues pertaining to the CO2 system were discovered.