Ah: SAS is addressing the “ other “ power check. This is especially a subject for the medium/heavy pilots, who face operating with loads and the people who would put them on your helicopter. What does this stuff weigh? The pilot can do his due diligence with regard to the engines meeting spec power, but then be undone by incorrectly marked loads, or more often unmarked loads which come with a guess* as to what they weigh and various combinations of the same. Now, what sort of power check can one do in that case?
*And some people flat out lie.