What identification data is required on an aircraft engine?

The identification data required on an aircraft engine is comprehensive, as it ensures proper tracking, regulatory compliance, and maintenance of the engine over its lifespan. The correct information includes the builder's name, model designation, builder's serial number, and type certificate number.

The builder's name and model designation provide clear identification of who manufactured the engine and its specific design, which is important for maintenance, parts replacement, and compliance with safety standards. The builder's serial number serves as a unique identifier for each individual engine, allowing for easy tracking of its history and any associated maintenance or service records. The type certificate number is crucial because it signifies that the engine design has been approved by the relevant aviation authority, ensuring that the engine meets all safety and performance standards.

Including all these elements together creates a complete picture necessary for identification in regulatory contexts, thus justifying the requirement for all of them.