A 100-hour inspection is required for which aircraft?

• A. An aircraft under 12,500 pounds that is used to carry passengers for hire.
• B. All aircraft at every 100 hours regardless of operation.
• C. Only cargo aircraft.
• D. Only experimental aircraft.

Answer: (A)

The 100-hour inspection is required for aircraft that are used for hire or used to carry passengers for hire, and for aircraft used in flight instruction. It must be performed at 100-hour intervals of time in service. In this case, the aircraft is under 12,500 pounds maximum takeoff weight and is used to carry passengers for hire, which clearly falls under the scenario that requires a 100-hour inspection. The other options aren’t correct because the rule isn’t limited to cargo or experimental aircraft, and it doesn’t apply to every aircraft regardless of operation—it applies specifically to aircraft used for hire or for instruction.