If you run an FBO or flight school and you use the same aircraft for both rental to customers and providing flight instruction, then you know you have to perform 100-hour inspections on your aircraft. But the timing for performing the 100-hour inspection can sometimes be confusing. For a discussion of how this requirement is applied in several real-world examples, please read my latest article on the subject: When is the 100-Hour Inspection Due for Aircraft Used for Rental and Flight Instruction?.