Which of the following is NOT a type of aircraft maintenance check?

The correct response identifies "Emergency procedures check" as not being a type of aircraft maintenance check. In aviation maintenance, there are established categories and requirements for regular maintenance checks to ensure safety and compliance. Annual inspections, 100-hour inspections, and preventative maintenance are all formally recognized types of maintenance checks.

Annual inspections are mandated for aircraft to be examined at least once every 12 months, focusing on the overall airworthiness history and condition. Similarly, 100-hour inspections are specific checks required for aircraft used for hire or flight instruction, ensuring continued safety over operating time. Preventative maintenance covers simple or minor work performed to prevent larger, more costly issues and is also a defined category under aviation regulations.

In contrast, an emergency procedures check is not classified as a maintenance check. This term refers to the verification of an aircrew's ability to handle emergency situations and is more aligned with operational training than maintenance. This distinction helps clarify the specific roles each of these processes play in aviation safety and regulatory compliance.