A certificated mechanic with at least an airframe rating may perform which type of inspection on the instrument?

A certificated mechanic with at least an airframe rating may perform which type of inspection on the instrument?

• A. Annual inspection
• B. 100 hour inspection on the instrument
• C. Preflight inspection
• D. Cosmetic inspection

Answer: (B)

Understanding how inspections are signed off helps explain why this option fits. The ability of a certificated mechanic to perform inspections depends on their rating and the regulation in force. The 100-hour inspection is the maintenance check that a mechanic with at least an airframe rating may perform and sign off without needing an inspector’s authorization. It covers the aircraft’s systems and components, including the instruments, on the cycle required for aircraft used for hire or flight training. Annual inspections, by contrast, require an inspector with an inspection authorization, so they cannot be completed by a mechanic with only the airframe rating. The preflight inspection is typically a pilot’s responsibility before flight and is not a mandated maintenance sign-off by a mechanic. Cosmetic inspections aren’t part of the required airworthiness inspections and don’t provide the formal airworthiness sign-off.

Understanding how inspections are signed off helps explain why this option fits. The ability of a certificated mechanic to perform inspections depends on their rating and the regulation in force. The 100-hour inspection is the maintenance check that a mechanic with at least an airframe rating may perform and sign off without needing an inspector’s authorization. It covers the aircraft’s systems and components, including the instruments, on the cycle required for aircraft used for hire or flight training.

Annual inspections, by contrast, require an inspector with an inspection authorization, so they cannot be completed by a mechanic with only the airframe rating. The preflight inspection is typically a pilot’s responsibility before flight and is not a mandated maintenance sign-off by a mechanic. Cosmetic inspections aren’t part of the required airworthiness inspections and don’t provide the formal airworthiness sign-off.