No, under U S part 91, not for hire ( part 91 for hire is different), you do not need 100 hr inspections to be legal. You need an annual once every calendar year. Doesn't matter what the maintenance manual says unless the 100 hr requirement is in ATA chap. 4 as an airworthiness limitation ( and it isn't). The Cessna 150 manual has a 100 hr as well and you dont need to do that under 91 either. Helicopter or airplane is no different. You had better be able to tell the FISDO wonks what inspection you are using and why, as a lot of them are misinformed. CFR 91.409 is pretty clear. As I stated above the only part of almost all maintenance manuals in the US that is FAA approved is chap 4.
Last edited by roscoe1; 24th Nov 2019 at 23:18.