The company has updated its planned maintenance system with amended checks and increased frequency for inspecting the main distribution valves of fixed fire suppression systems.
The ATSB acknowledges the safety action taken by KLCSM to increase the frequency of inspecting fixed fire suppression system distribution valves. However, the checks and inspection routines that were in place at the time of the fire had failed to detect the issues that resulted in the multiple failures of Marigold’s Halon system. This indicates that KLCSM’s procedures for equipment maintenance and crew knowledge/training in this regard require a thorough review. The ATSB has issued the following recommendation to KLCSM.