100 Hour Inspections
100 hour inspections are more common among Part 135 operations who fly for hire because of the number of hours flown; however, they do apply to private aircraft owners under Part 91. 100 hour inspections cover the same ground as an annual inspection, just on a hourly basis, rather than a calendar. 100 hour inspections do not take the place of an annual inspection; rather they work with in conjunction to ensure that the aircraft continues to operate in an airworthy condition. An A&P can do 100-hour inspections, but only an A&P with an Inspection Authorization (IA) can do the annual.