A certificated mechanic with a powerplant rating may perform the 100-hour inspection on what scope?

• A. Only the airframe
• B. Only engine components
• C. A powerplant or any component thereof
• D. Only the powerplant itself

Answer: (C)

A mechanic’s certificate rating controls what you’re allowed to inspect during a 100-hour inspection. With a powerplant rating, you’re authorized to perform the 100-hour inspection on the powerplant and on any component that is part of the powerplant installation. That means you can inspect the engine itself and related equipment and accessories that belong to the powerplant system, even if those items aren’t the engine core alone. It isn’t limited to only the engine proper, nor is it restricted to airframe components not part of the powerplant. The broadest correct scope here is the powerplant or any component thereof.