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You are here: Home › Case Studies › Real Life Incident: CO2 Labelling Mixup

Real Life Incident: CO2 Labelling Mixup

By MARS Reports | In: Case Studies | Last Updated on August 6, 2020

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During fire safety equipment verifications, the fixed CO2 cargo hold line identified as number five hold was tested by blowing compressed air into the system line. Despite this, no air passed through to the other end located at the forward and aft hatch coaming of number five hold. The CO2 line’s air drain in the engine room was checked and found to be in order.

The CO2 pipe aft of hold five was dismantled to check for any clogging but none was found. Again, compressed air was blown through but there was no air arriving at the exit end.

Image Credits: nautinst.org

Image Credits: nautinst.org

Further investigation found that in the CO2 room, the identification for the release valves for holds one, two, four and five were misidentified. Only hold number three was correctly identified. As it turned out, the system was mis-identified upon initial installation from right to left instead of from left to right. Hence, only hold number three was correct, the others being in reverse order, and the error had not been caught.

Lessons learned

  • Testing for the proper operation of the CO2 system is to be thoroughly conducted including physical check of outlets, not just cursory test or simply paper documentation for compliance.
  • Proper communication with personnel involved in the test must be established in order to confirm which valves are opened and that the release valve and lines match the labels on the information plate in the CO2 room.

Reference: nautinst.org

 

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The Mariners' Alerting and Reporting Scheme is primarily a confidential reporting system run by The Nautical Institute to allow full reporting of accidents (and near misses) without fear of identification or litigation. MARS reports also regularly comprise alerts condensed from official industry sources, so that issues resulting from recent incidents can be efficiently relayed to the mariner on board.

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    October 21, 2015 at 12:05 pm

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