This Efficiency Bulletin originally issued in 2016 is being updated to reflect the experience gained relative to FLEX equipment preventive maintenance (PM) strategies and sharing of FLEX operational experience. Continued reporting of experience and performance data for FLEX equipment in the nuclear industry is necessary. Initially, the industry adopted a conservative process combining failure modes and effects analysis with vendor information and operating experience from external emergency response organizations to create the initial PM strategies. The industry continues to build its collective testing experience to validate the current scope and frequency of maintenance strategies which can be adjusted based on actual experience from storing, testing, and using the FLEX equipment. Sharing of operational experience is critical to this strategy.