The 100-hour inspection can be overflown by up to how many hours?

• A. 20 hours
• B. 5 hours
• C. 10 hours
• D. 2 hours

Answer: (C)

The timing concept being tested is the allowable grace period for completing a 100-hour inspection. If you’re approaching the 100-hour limit and can’t finish the inspection right at that moment, you’re permitted to fly the aircraft to a location where the inspection can be performed and continue operating for up to ten additional hours to reach that maintenance facility. This ten-hour window is designed so the aircraft isn’t grounded immediately when the inspection is due, as long as the extra flight time stays within that limit. Beyond ten hours, continued flight would not be permitted until the inspection is completed and the airworthiness is restored. So, the correct allowance is ten hours. The other options are not the defined grace period.