Marine Safety Forum

To allow the survey to be conducted in a safe manner the safety pins had been put in place, while the outside contractors carried out their inspection. When finished these should have been removed, to make the system ready for activation.

On re-joining the vessel at the scheduled crew change almost 4 weeks after the survey, the C/E/O after a routine inspection, found that the safety pins inserted during the survey had not been removed and were still in place making the system inoperable. This unnoticed action had a high potential to develop into a serious incident if the CO2 system had been required for extinguishing an engine room fire.

https://www.marinesafetyforum.org/wp-content/uploads/2022/06/msf-safety-alert-22.10.pdf