Which of the following aircraft categories cannot be type certificated for more than one category?

In the context of aircraft certification, type certification categorizes aircraft based on their intended use and operational capabilities. Each category of aircraft is designed with specific performance and safety standards, which are important in ensuring that they can operate safely within their designated roles.

The commuter category is specifically designated for aircraft that have a maximum seating capacity of fewer than 20 passengers and are intended for commuter service. This category is strict in its guidelines and limitations regarding operational use; hence, it is not designed to cross into other categories. The nature of commuter aircraft is such that they typically operate under defined criteria that do not allow them to be certified for additional categories like utility or transport.

In contrast, aircraft in the utility, transport, and normal categories may be certified for multiple uses, as their designs and capabilities often overlap to accommodate a broader range of operations. For instance, utility aircraft can be used for various purposes, including cargo transport and aerial work, while transport aircraft are commonly used for passenger operations and freight. The normal category, which covers general aviation aircraft, can also be certified across multiple operations as they generally meet diverse requirements.

Therefore, the commuter category stands out as one that is limited in its versatility for type certification compared to the other categories, which can more easily accommodate