Question? Would Fatty acid methyl ester be a danger at any level? With its sticky propensity, wouldn't 1ppm be too much? Seems to me 038 fuel testing results entertained that 70ppm water was cumulative, and could be a problem regardless the presence or not of atmospheric moisture or lack of sumping over time? I recall they pointed out that even very small amounts of water was a problem, because so little was known of fuel performance at very low temps due to ETOPS, etc.?
Is the industry then actually trying to allow some amount of this contaminant in the test simply because it "is too expensive to maintain isolated piping and production storage"??