A certificated mechanic with a powerplant rating may perform the 100-hour inspection on a powerplant or any component thereof and approve for return to service. Which statement best describes this authority?

A certificated mechanic with a powerplant rating may perform the 100-hour inspection on a powerplant or any component thereof and approve for return to service. Which statement best describes this authority?

• A. It applies only to powerplant components, not the powerplant as a whole
• B. The 100-hour inspection on a powerplant or any component thereof and approval for return to service
• C. The airframe has to be inspected separately
• D. It requires additional approval from the FAA for return to service

Answer: (B)

Understanding who can sign off a 100-hour inspection on the powerplant is key. A certificated mechanic who holds a powerplant rating is authorized to perform the 100-hour inspection on the powerplant itself or on any component of the powerplant, and to approve the item for return to service after the work is completed. This reflects that the mechanic’s rating covers the powerplant area, so their inspection and sign-off certify that the powerplant (or its parts) meets airworthiness standards and can go back into service. This authority does not imply extra FAA approval beyond the mechanic’s own endorsement, and while the airframe may require its own 100-hour inspection when due, that is a separate matter governed by the airframe rating.

Understanding who can sign off a 100-hour inspection on the powerplant is key. A certificated mechanic who holds a powerplant rating is authorized to perform the 100-hour inspection on the powerplant itself or on any component of the powerplant, and to approve the item for return to service after the work is completed. This reflects that the mechanic’s rating covers the powerplant area, so their inspection and sign-off certify that the powerplant (or its parts) meets airworthiness standards and can go back into service.

This authority does not imply extra FAA approval beyond the mechanic’s own endorsement, and while the airframe may require its own 100-hour inspection when due, that is a separate matter governed by the airframe rating.